University of California
California Fish Website

California Fish Species

Freshwater native and non-native fish species present historically and/or currently, determined from the PISCES database (Feb. 26, 2014). Please note that THESE DISTRIBUTIONS ARE DRAFT, while we sort out some bugs associated with duplicate watershed names.

Amargosa Canyon speckled dace

Rhinichthys osculus nevadensis
Thumbnail. Speckled dace, approximately 7 cm (3”) long. Date: 7/8/2007. Photo by Dave Giordano.

Amargosa River pupfish

Cyprinodon nevadensis amargosae
Thumbnail. Amargosa pupfish, left side. Photographed at Ash Meadows, Nevada in April 2006. Photo by Joseph C. Sullivan.

American Shad

Alosa sapidissima
Thumbnail. American shad, head. Caught on the Feather River (Star Bend boat launch) on 4 July 2008. Approximately 20 cm TL.  Photo by Brian Currier.

Arroyo chub

Gila orcutti
Thumbnail. Arroyo chub. Captured from San Antonio Creek (Vandenberg Air Force Base) in 2008. Photo by Carl Page, ARS Consulting.

Bigeye marbled sculpin

Cottus klamathensis macrops
Thumbnail. Marbled sculpin, approximately 7.5 cm (3”) long, taken by Lisa Thompson and Daniel J. Drake. Shasta River, California. 12/16/2003.

Bigscale logperch

Percina macrolepida
Thumbnail. Bigscale logperch, captured from Putah Creek in November 2008. Photo by Teejay O'Rear, March 2009.

Black bullhead

Ameiurus melas
Thumbnail. Black bullhead, approximately 15 cm (6”) long. Location: Suisun Marsh, California Date: 8/6/2007. Photo by Dave Giordano.

Black crappie

Pomoxis nigromaculatus
Thumbnail. Black crappie, captured in rotary screw trap on the Sacramento River at Knight's Landing on 2/26/2009. Photo by Dan Worth, CDFW

Blue catfish

Ictalurus furcatus
Thumbnail. Blue catfish, adult. Caught in Marion, Alabama on 9 February 1994. Photo by Konrad Schmidt, Nongame Fish Biologist, DES, Minn. DNR

Blue chub

Gila coerulea

Bluefin killifish

Lucania goodei

Bluegill

Lepomis macrochirus
Thumbnail. Bluegill approximately 15 cm (6”) long. Location: Leonard Lake, California Date: 8/6/2008 Photo: Lisa Thompson

Bonytail

Gila elegans

Brook stickleback

Culaea inconstans
Thumbnail. Brook stickleback. Photo by Konrad Schmidt, Nongame Fish Biologist, Division of Ecological Services, Minnesota DNR

Brook Trout

Salvelinus fontinalis
Thumbnail. Brook trout, captured in Lassen Creek, Modoc County, CA, on 8 July 2007. Photo by Dave Giordano

Brown bullhead

Ameiurus nebulosus
Thumbnail. Brown bullhead. Caught in Seneca County, New York. Photo by Arthur Masloski, January 2009.

Brown Trout

Salmo trutta
Thumbnail. Brown trout, approximately 20 cm (8”) long. Location: Deer Creek, California Date: 6/21/2007. Photo by Dave Giordano

Bull trout

Salvelinus confluentus

California Coast fall Chinook salmon

Oncorhynchus tshawytscha
Thumbnail. Chinook salmon. Spring-run Chinook salmon (female spawner) swimming in Butte Creek, CA on 14 September 2006. Photo - Lisa Thompson, UC Davi

California golden trout

Oncorhynchus mykiss aguabonita
Thumbnail. Golden trout caught in Guitar Lake, 7/16/05. Length: 21 cm. Photo courtesy of Howard Kern.

California killifish

Fundulus parvipinnis
Thumbnail. California killifish, captured from Zuma Creek Lagoon, Los Angeles County, CA on 26 January 2006. Photo by Steve Howard.

California tilapia (hybrid)

Oreochromis spp.
Thumbnail. Mozambique tilapia hybrid, female, captured from the Salton Sea in 2006. Photo by Sharon Keeney, CDFW.

Central California coast winter steelhead

Oncorhynchus mykiss
Thumbnail. Rainbow trout, 18 cm (7”) long. Location: Deer Creek, California (Yuba River basin). Date: 6/21/2007. Photo by Dave Giordano.

Central California roach

Lavinia symmetricus symmetricus
Thumbnail. California roach. Captured from the Gualala River. Photo by Carl Page, ARS Consulting.

Central Coast coho salmon

Oncorhynchus kisutch
Thumbnail. Coho salmon fry taken by Lisa Thompson. Location: Shasta River, California. Date: 4/13/2004. Fish was approximately 6.5 cm long (2.5”).

Central Valley fall Chinook salmon

Oncorhynchus tshawytscha
Thumbnail. Chinook salmon. Spring-run Chinook salmon (female spawner) swimming in Butte Creek, CA on 14 September 2006. Photo - Lisa Thompson, UC Davi

Central Valley late fall Chinook salmon

Oncorhynchus tshawytscha
Thumbnail. Chinook salmon. Spring-run Chinook salmon (female spawner) swimming in Butte Creek, CA on 14 September 2006. Photo - Lisa Thompson, UC Davi

Central Valley spring Chinook salmon

Oncorhynchus tshawytscha
Thumbnail. Chinook salmon. Spring-run Chinook salmon (female spawner) swimming in Butte Creek, CA on 14 September 2006. Photo - Lisa Thompson, UC Davi

Central Valley steelhead

Oncorhynchus mykiss
Thumbnail. Rainbow trout, 18 cm (7”) long. Location: Deer Creek, California (Yuba River basin). Date: 6/21/2007. Photo by Dave Giordano.

Central Valley winter Chinook salmon

Oncorhynchus tshawytscha
Thumbnail. Chinook salmon. Spring-run Chinook salmon (female spawner) swimming in Butte Creek, CA on 14 September 2006. Photo - Lisa Thompson, UC Davi

Channel catfish

Ictalurus punctatus
Thumbnail. Channel catfish, caught in Nacimiento Reservoir in May 2008 by Teejay O'Rear. Photo by Amber Manfree.

Chum salmon

Oncorhynchus keta
Thumbnail. Chum salmon, adult. Captured at the mouth of Chico Creek on Puget Sound, in Kitsap County, Washington, 8 November 2007. Photo - Larry Coté.

Clear Lake hitch

Lavinia exilicauda chi
Thumbnail. Hitch adult. Photo courtesy of Professor Peter B. Moyle.

Clear Lake prickly sculpin

Cottus asper subspecies
Thumbnail. Prickly sculpin, approximately 10 cm (4”) long. Location: Suisun Marsh, California. Date: 8/6/2007. Photo by Dave Giordano.

Clear Lake roach

Lavinia symmetricus subspecies
Thumbnail. California roach. Captured from the Gualala River. Photo by Carl Page, ARS Consulting.

Clear Lake splittail

Pogonichthys ciscoides

Clear Lake tule perch

Hysterocarpus traskii lagunae
Thumbnail. Tule perch, 13 cm (5”) long. Location: Suisun March. Date: 8/6/2007. Photo by Dave Giordano.

Coastal cutthroat trout

Oncorhynchus clarki clarki
Thumbnail. Cutthroat trout, sea-run adult. Caught along the beaches of Hood Canal near Seabeck, Washington. Photo courtesy of Larry Coté.

Coastal rainbow trout

Oncorhynchus mykiss irideus
Thumbnail. Rainbow trout, 18 cm (7”) long. Location: Deer Creek, California (Yuba River basin). Date: 6/21/2007. Photo by Dave Giordano.

Coastal threespine stickleback

Gasterosteus aculeatus aculeatus
Thumbnail. Threespine stickleback (armored). Location: Sacramento-San Joaquin River Delta. Date: 16 April 2011. Photo by Christopher Mosser, UC Davis.

Coastrange sculpin

Cottus aleuticus
Thumbnail. Coastrange sculpin, approx. 85 mm (3.5

Colorado pikeminnow

Ptychocheilus lucius
Thumbnail. Colorado pikeminnow, adult, right side. Photo by Cameron T. Wilcox, Colorado State University.

Colorado River cutthroat trout

Oncorhynchus clarkii pleuriticus
Thumbnail. Cutthroat trout, sea-run adult. Caught along the beaches of Hood Canal near Seabeck, Washington. Photo courtesy of Larry Coté.

Common carp

Cyprinus carpio
Thumbnail. Common carp approximately 18 cm (7”) long. Location: Suisun Marsh, California. Date: 8/8/2008. Photo by Dave Giordano.

Cottonball Marsh pupfish

Cyprinodon salinus milleri
Thumbnail. Salt Creek pupfish, male, dorsal/frontal view. Photographed at Salt Creek, CA (Death Valley National Park). Photo by Rian K. Long.

Cow Head tui chub

Siphatales thalassinus vaccaceps
Thumbnail. Tui chub, approximately 10 cm (4”) long. Date: 7/10/2007. Photo by Dave Giordano.

Delta smelt

Hypomesus pacificus
Thumbnail. Delta Smelt, Adult, UC Davis Fish Conservation & Culture Lab, Byron, CA (largely funded by CDWR). May 15, 2008. Photo - Dave Giordano

Desert pupfish

Cyprinodon macularius
Thumbnail. Desert pupfish, male, breeding color. Borrego Palm Canyon Pond, Anza-Borrego Desert State Park. Date: May 2010. Photo - Sharon Keeney, CDFW

Eagle Lake rainbow trout

Oncorhynchus mykiss aquilarum
Thumbnail. Rainbow trout, 18 cm (7”) long. Location: Deer Creek, California (Yuba River basin). Date: 6/21/2007. Photo by Dave Giordano.

Eagle Lake tui chub

Siphatales bicolor subspecies
Thumbnail. Tui chub, approximately 10 cm (4”) long. Date: 7/10/2007. Photo by Dave Giordano.

Eulachon

Thaleichthys pacificus
Thumbnail. Eulachon, male, caught in rotary screw trap on the Sacramento River at Knights Landing on 1/27/2006. Photo by Michael S. Brown, CDFW

Fathead minnow

Pimephales promelas
Thumbnail. Fathead minnow. Photo by Konrad Schmidt, Nongame Fish Biologist, Division of Ecological Services, Minnesota Department of Natural Resources

Flannelmouth sucker

Catostomus latipinnis

Flathead Catfish

Pylodictis olivaris
Thumbnail. Flathead catfish, adult. Caught in the St. Croix River, Washington County, Minnesota, in summer 1976. Photo by Konrad Schmidt, Minn. DNR

Golden shiner

Notemigonus crysoleucas
Thumbnail. Golden shiner, caught in Iron Gate Reservoir, California on 12 May 2009 by Teejay O'Rear. Photo by Amber Manfree.

Goldfish

Carassius auratus
Thumbnail. Goldfish, captured in rotary screw trap on Sacramento River at Knight's Landing. Date: January 2009. Photo by Dan Worth, CDFW.

Goose Lake lamprey

Entosphenus tridentata
Thumbnail. Pacific lamprey, captured in rotary screw trap on Sacramento River at Knight's Landing. Photo by Dan Worth, CDFW.

Goose Lake redband trout

Oncorhynchus mykiss subspecies
Thumbnail. Rainbow trout, 18 cm (7”) long. Location: Deer Creek, California (Yuba River basin). Date: 6/21/2007. Photo by Dave Giordano.

Goose Lake sucker

Catostomus occidentalis lacusanserinus
Thumbnail. Sacramento sucker, adult, caught in Putah Creek, California on 26 June 2008 by Teejay O'Rear. Photo by Amber Manfree.

Goose Lake tui chub

Siphatales thalassinus thalassinus
Thumbnail. Tui chub, approximately 10 cm (4”) long. Date: 7/10/2007. Photo by Dave Giordano.

Grass carp

Ctenopharyngodon idella
Thumbnail. Grass carp. Photographed on 05/13/08, by Konrad Schmidt, Nongame Fish Biologist, Division of Ecological Services, Minnesota DNR.

Green Sunfish

Lepomis cyanellus
Thumbnail. Green sunfish with measurements Location: Leonard Lake, California Date: 8/6/2008 Photo: Lisa Thompson

Gualala roach

Lavinia parvipinnus
Thumbnail. California roach. Captured from the Gualala River. Photo by Carl Page, ARS Consulting.

Hardhead

Mylopharodon conocephalus
Thumbnail. Hardhead, adult, right side. Location: Center for Aquatic Biology and Aquaculture, UC Davis. Date: 17 May 2007. Photo by Dave Giordano.

High Rock Springs tui chub

Siphatales bicolor subspecies
Thumbnail. Tui chub, approximately 10 cm (4”) long. Date: 7/10/2007. Photo by Dave Giordano.

Humboldt sucker

Catostomus occidentalis humboldtianus
 

Thumbnail. Sacramento sucker, adult, caught in Putah Creek, California on 26 June 2008 by Teejay O'Rear. Photo by Amber Manfree.

 

Inland threespine stickleback

Gasterosteus aculeatus microcephalus
Thumbnail. Threespine stickleback (armored). Location: Sacramento-San Joaquin River Delta. Date: 16 April 2011. Photo by Christopher Mosser, UC Davis.

Kern brook lamprey

Lampetra hubbsi

Kern River rainbow trout

Oncorhynchus mykiss gilberti
Thumbnail. Golden trout caught in Guitar Lake, 7/16/05. Length: 21 cm. Photo courtesy of Howard Kern.

Klamath largescale sucker

Catostomus snyderi

Klamath Mountains Province summer steelhead

Oncorhynchus mykiss
Thumbnail. Rainbow trout, 18 cm (7”) long. Location: Deer Creek, California (Yuba River basin). Date: 6/21/2007. Photo by Dave Giordano.

Klamath Mountains Province winter steelhead

Oncorhynchus mykiss
Thumbnail. Rainbow trout, 18 cm (7”) long. Location: Deer Creek, California (Yuba River basin). Date: 6/21/2007. Photo by Dave Giordano.

Klamath River lamprey

Entosphenus similis
Thumbnail. Klamath River lamprey. Captured from the upper Trinity River near river mile 85 on 22 July 2009. Photo courtesy of John Hileman, CDFW.

Klamath smallscale sucker

Catostomus rimiculus
Thumbnail. Klamath smallscale sucker, captured from the maintstem Klamath River near Orleans, CA. Photo by Brian Hodge, Humboldt State University.

Klamath speckled dace

Rhinichthys osculus klamathensis
Thumbnail. Speckled dace, approximately 7 cm (3”) long. Date: 7/8/2007. Photo by Dave Giordano.

Klamath tui chub

Siphatales bicolor bicolor
Thumbnail. Tui chub, approximately 10 cm (4”) long. Date: 7/10/2007. Photo by Dave Giordano.

Lahontan cutthroat trout

Oncorhynchus clarki henshawi
Thumbnail. Cutthroat trout, sea-run adult. Caught along the beaches of Hood Canal near Seabeck, Washington. Photo courtesy of Larry Coté.

Lahontan lake tui chub

Siphatales bicolor pectinifer
Thumbnail. Tui chub, approximately 10 cm (4”) long. Date: 7/10/2007. Photo by Dave Giordano.

Lahontan mountain sucker

Catostomus platyrhynchus
Thumbnail. Mountain sucker. Photo courtesy of Professor Peter B. Moyle.

Lahontan redside

Richardsonius egregius
Thumbnail. Lahontan redside, caught in Bogard Spring Creek (Eagle Lake watershed) in 2011. Photo by Teejay O'Rear.

Lahontan speckled dace

Rhinichthys osculus robustus
Thumbnail. Speckled dace, approximately 7 cm (3”) long. Date: 7/8/2007. Photo by Dave Giordano.

Lahontan stream tui chub

Siphatales bicolor obesus
Thumbnail. Tui chub, approximately 10 cm (4”) long. Date: 7/10/2007. Photo by Dave Giordano.

Lake trout

Salvelinus namaycush
Thumbnail. Lake trout, captured from Donner Lake on 12/21/2009. Length: 53 cm (21

Largemouth Bass

Micropterus salmoides
Thumbnail. Largemouth bass approximately 30 cm (12”) long. Location: Deer Creek, California Date 6/22/2007. Photo by Dave Giordano.

Little Kern golden trout

Oncorhynchus mykiss whitei
Thumbnail. Golden trout caught in Guitar Lake, 7/16/05. Length: 21 cm. Photo courtesy of Howard Kern.

Long Valley speckled dace

Rhinichthys osculus subspecies
Thumbnail. Speckled dace, approximately 7 cm (3”) long. Date: 7/8/2007. Photo by Dave Giordano.

Longfin smelt

Spirinchus thaleichthys
Thumbnail. Longfin smelt, male, 141 mm FL. Photographed on March 7, 2008 at the Tracy Fish Collection Facility, Tracy, CA. Photo by René Reyes, USBR.

Longjaw mudsucker

Gillichthys mirabilis
Thumbnail. Longjaw mudsucker. Location: Eureka Slough, Humboldt Bay, CA. Date: 2003. Photo by Mike Wallace, California Department of Fish and Game.

Lost River sucker

Catostomus luxatus

Lower Klamath marbled sculpin

Cottus klamathensis polyporus
Thumbnail. Marbled sculpin, approximately 7.5 cm (3”) long, taken by Lisa Thompson and Daniel J. Drake. Shasta River, California. 12/16/2003.

McCloud River redband trout

Oncorhynchus mykiss stonei
Thumbnail. Rainbow trout, 18 cm (7”) long. Location: Deer Creek, California (Yuba River basin). Date: 6/21/2007. Photo by Dave Giordano.

Mississippi silversides

Menidia beryllina subspecies
Thumbnail. Mississippi silverside approximately 8 cm (3”) long. Location: Suisun Marsh, California Date: 8/8/2008. Photo by Dave Giordano.

Modoc sucker

Catostomus microps
Thumbnail. Modoc sucker, spawning. Photo by Stewart Reid, Western Fishes, Ashland, OR.

Mojave tui chub

Siphatales mohavensis
Thumbnail. Tui chub, approximately 10 cm (4”) long. Date: 7/10/2007. Photo by Dave Giordano.

Monterey hitch

Lavinia exilicauda harengeus
Thumbnail. Hitch adult. Photo courtesy of Professor Peter B. Moyle.

Monterey roach

Lavinia symmetricus subditus
Thumbnail. California roach. Captured from the Gualala River. Photo by Carl Page, ARS Consulting.

Monterey sucker

Catostomus occidentalis mnioltiltus
Thumbnail. Sacramento sucker, adult, caught in Putah Creek, California on 26 June 2008 by Teejay O'Rear. Photo by Amber Manfree.

Mountain whitefish

Prosopium williamsoni
Thumbnail. Mountain whitefish. Location: Lower Truckee River, NV. Date: Oct. 2007. Photo by Marianne Denton, Dept. NRES, University of Nevada, Reno.

Navarro roach

Lavinia symmetricus navarroensis
Thumbnail. California roach. Captured from the Gualala River. Photo by Carl Page, ARS Consulting.

Northern (Pit) roach

Lavinia mitrulus
Thumbnail. California roach. Captured from the Gualala River. Photo by Carl Page, ARS Consulting.

Northern California brook lamprey

Entosphenus folletti
Thumbnail. Klamath River lamprey. Captured from the upper Trinity River near river mile 85 on 22 July 2009. Photo courtesy of John Hileman, CDFW.

Northern California coast summer steelhead

Oncorhynchus mykiss
Thumbnail. Rainbow trout, 18 cm (7”) long. Location: Deer Creek, California (Yuba River basin). Date: 6/21/2007. Photo by Dave Giordano.

Northern California coast winter steelhead

Oncorhynchus mykiss
Thumbnail. Rainbow trout, 18 cm (7”) long. Location: Deer Creek, California (Yuba River basin). Date: 6/21/2007. Photo by Dave Giordano.

Northern green sturgeon

Acipenser medirostris
Thumbnail. Green sturgeon, juvenile, in tank. Photo courtesy of Dennis Cocherell, UC Davis.

Owens pupfish

Cyprinodon radiosus
Thumbnail. Owens pupfish, male. Location: Fish Slough, CA. Photo by Joe Ferreira, California Department of Fish and Game.

Owens speckled dace

Rhinichthys osculus subspecies
Thumbnail. Speckled dace, approximately 7 cm (3”) long. Date: 7/8/2007. Photo by Dave Giordano.

Owens sucker

Catostomus fumeiventris
Thumbnail. Owens sucker, underwater. Location: Hot Creek, CA. Photo by Joe Ferreira, California Department of Fish and Game.

Owens tui chub

Siphatales bicolor snyderi
Thumbnail. Tui chub, approximately 10 cm (4”) long. Date: 7/10/2007. Photo by Dave Giordano.

Pacific lamprey

Entosphenus tridentata
Thumbnail. Pacific lamprey, captured in rotary screw trap on Sacramento River at Knight's Landing. Photo by Dan Worth, CDFW.

Paiute cutthroat trout

Oncorhynchus clarki seleneris
Thumbnail. Cutthroat trout, sea-run adult. Caught along the beaches of Hood Canal near Seabeck, Washington. Photo courtesy of Larry Coté.

Paiute sculpin

Cottus beldingi
Thumbnail. Paiute sculpin (lateral view) from Sagehen Creek, CA in 2012. Photo by Matt Young.

Pink salmon

Oncorhynchus gorbuscha

Pit River tui chub

Siphatales thalassinus subspecies
Thumbnail. Tui chub, approximately 10 cm (4”) long. Date: 7/10/2007. Photo by Dave Giordano.

Pit sculpin

Cottus pitensis
Thumbnail. Pit sculpin. Modoc County, CA. July 10, 2007. Photo by Dave Giordano.

Pit-Klamath brook lamprey

Lampetra lethophaga
Thumbnail. Pit-Klamath brook lamprey adult. Location: Dry Creek, Lake County, Oregon. Date: 9/18/2007. Photo by Michael P. Heck, Oregon DFW.

Porthole livebearer

Poeciliopsis gracilis
Thumbnail. Porthole livebearer, female. Location: Irrigation drain (Oasis-Grant), north end of the Salton Sea. 5/20/2010. Photo - Sharon Keeney, CDFW.

Prickly sculpin

Cottus asper subspecies
Thumbnail. Prickly sculpin, approximately 10 cm (4”) long. Location: Suisun Marsh, California. Date: 8/6/2007. Photo by Dave Giordano.

Pumpkinseed

Lepomis gibbosus
Thumbnail. Pumpkinseed, captured from Lake Davis, CA. Photo by Robert Vincik, California Department of Fish and Game.

Rainwater killifish

Lucania parva

Razorback sucker

Xyrauchen texanus
Thumbnail. Razorback sucker. Photo taken at the Ouray National Fish Hatchery by Mark Fuller, US Fish & Wildlife Service, provided by Tim Modde, USFWS.

Red Hills roach

Lavinia symmetricus subspecies
Thumbnail. California roach. Captured from the Gualala River. Photo by Carl Page, ARS Consulting.

Red shiner

Cyprinella lutrensis
Thumbnail. Red shiner. Caught in the Rock River, Rock County, Minnesota, in July 2002. Photo by Konrad Schmidt, Minn. DNR.

Redear sunfish

Lepomis microlophus
Thumbnail. Redear sunfish. Photo courtesy of Professor Peter B. Moyle.

Redeye bass

Micropterus coosae
Thumbnail. Redeye bass, adult. Caught in eastern USA. Photo courtesy of Drew Gregory.

Reticulate sculpin

Cottus perplexus

Riffle sculpin

Cottus gulosus
Thumbnail. Riffle sculpin, side view. Location: South Fork American River. Date: 5 May 2010. Photo by Lisa C. Thompson.

River lamprey

Lampetra ayersi
Thumbnail. River lamprey, captured in rotary screw trap on Sacramento River at Knight's Landing. Photo by Dan Worth, CDFW.

Rough sculpin

Cottus asperrimus

Russian River roach

Lavinia symmetricus subspecies
Thumbnail. California roach. Captured from the Gualala River. Photo by Carl Page, ARS Consulting.

Russian River tule perch

Hysterocarpus traskii pomo
Thumbnail. Tule perch, 13 cm (5”) long. Location: Suisun March. Date: 8/6/2007. Photo by Dave Giordano.

Sacramento blackfish

Orthodon microlepidotus
Thumbnail. Sacramento blackfish, caught in the San Joaquin river near Stockton on 11/11/08. Photo by Steve Reem.

Sacramento hitch

Lavinia exilicauda exilicauda
Thumbnail. Hitch adult. Photo courtesy of Professor Peter B. Moyle.

Sacramento perch

Archoplites interruptus
Thumbnail. Sacramento perch, adult male. Captured from Sindicich Lagoon, Martinez, California in May 2001. Photo by Chris Miller, Contra Costa MVCD.

Sacramento pikeminnow

Ptychocheilus grandis
Thumbnail. Sacramento pikeminnow, juvenile. Location: Deer Creek California (Yuba River basin). Date: 6/20/2007. Photo by Dave Giordano.

Sacramento speckled dace

Rhinichthys osculus subspecies
Thumbnail. Speckled dace, approximately 7 cm (3”) long. Date: 7/8/2007. Photo by Dave Giordano.

Sacramento splittail

Pogonichthys macrolepidotus
Thumbnail. Sacramento splittail, adult, from the Cosumnes River, CA. Photo courtesy of Professor Peter B. Moyle.

Sacramento sucker

Catostomus occidentalis occidentalis
Thumbnail. Sacramento sucker, adult, caught in Putah Creek, California on 26 June 2008 by Teejay O'Rear. Photo by Amber Manfree.

Sacramento tule perch

Hysterocarpus traskii traskii
Thumbnail. Tule perch, 13 cm (5”) long. Location: Suisun March. Date: 8/6/2007. Photo by Dave Giordano.

Sailfin molly

Poecilia latipinna
Thumbnail. Sailfin molly, male, left side. Irrigation drain (Oasis-Grant Drain) at the north end of the Salton Sea, 2010. Photo - Sharon Keeney, CDFW.

Salt Creek pupfish

Cyprinodon salinus salinus
Thumbnail. Salt Creek pupfish, male, dorsal/frontal view. Photographed at Salt Creek, CA (Death Valley National Park). Photo by Rian K. Long.

Santa Ana speckled dace

Rhinichthys osculus subspecies
Thumbnail. Speckled dace, approximately 7 cm (3”) long. Date: 7/8/2007. Photo by Dave Giordano.

Santa Ana sucker

Catostomus santaanae
Thumbnail. Santa Ana sucker, behind rock, in the San Gabriel River, CA, on 06/27/2007. Photo by Manna Warburton.

Saratoga Springs pupfish

Cyprinodon nevadensis nevadensis
Thumbnail. Amargosa pupfish, left side. Photographed at Ash Meadows, Nevada in April 2006. Photo by Joseph C. Sullivan.

Shay Creek stickleback

Gasterosteus aculeatus subspecies
Thumbnail. Threespine stickleback (armored). Location: Sacramento-San Joaquin River Delta. Date: 16 April 2011. Photo by Christopher Mosser, UC Davis.

Shimofuri goby

Tridentiger bifasciatus
Thumbnail. Shimofuri goby, approximately 5 cm (2”) long. Location: Suisun Marsh, California Date: 8/6/2007. Photo by Dave Giordano.

Shiner perch

Cymatogaster aggregata
Thumbnail. Shiner perch, captured from Edison Canal, Ventura County, CA on 15 December 2005. Photo by Steve Howard.

Shortfin molly

Poecilia mexicana
Thumbnail. Shortfin molly, male. Location: In a wash just south of Bombay Beach, Salton Sea. Date: Sept. 27, 2010. Photo by Sharon Keeney, CDFW.

Shortnose sucker

Chasmistes brevirostris
Thumbnail. Shortnose sucker. Photo by Stewart Reid, Western Fishes, Ashland, OR.

Shoshone pupfish

Cyprinodon nevadensis shoshone
Thumbnail. Amargosa pupfish, left side. Photographed at Ash Meadows, Nevada in April 2006. Photo by Joseph C. Sullivan.

Smallmouth Bass

Micropterus dolomieu
Thumbnail. Smallmouth bass. Photo courtesy of Drew Gregory.

Sockeye (Kokanee) Salmon

Onchorynchus nerka
Thumbnail. Kokanee salmon. Location: Kootenay Lake, BC, Canada, Date: circa 1994, Photo by Lisa Thompson.

South Central California coast steelhead

Oncorhynchus mykiss
Thumbnail. Rainbow trout, 18 cm (7”) long. Location: Deer Creek, California (Yuba River basin). Date: 6/21/2007. Photo by Dave Giordano.

Southern California steelhead

Oncorhynchus mykiss
Thumbnail. Rainbow trout, 18 cm (7”) long. Location: Deer Creek, California (Yuba River basin). Date: 6/21/2007. Photo by Dave Giordano.

Southern green sturgeon

Acipenser medirostris
Thumbnail. Green sturgeon, juvenile, in tank. Photo courtesy of Dennis Cocherell, UC Davis.

Southern Oregon Northern California coast coho salmon

Oncorhynchus kisutch
Thumbnail. Coho salmon fry taken by Lisa Thompson. Location: Shasta River, California. Date: 4/13/2004. Fish was approximately 6.5 cm long (2.5”).

Southern Oregon Northern California coast fall Chinook salmon

Oncorhynchus tshawytscha
Thumbnail. Chinook salmon. Spring-run Chinook salmon (female spawner) swimming in Butte Creek, CA on 14 September 2006. Photo - Lisa Thompson, UC Davi

Spotted bass

Micropterus punctulatus
Thumbnail. Spotted bass, juvenile, approximately 7.5 cm (3”) long. Location: Deer Creek, California Date: 6/22/2007. Photo by Dave Giordano.

Staghorn sculpin

Leptocottus armatus
Thumbnail. Pacific staghorn sculpin caught in Suisun Marsh, CA on 20 August 2008. Photo by Amber Manfree.

Starry flounder

Platichthys stellatus
Thumbnail. Starry flounder, juvenile, approximately 7.5 cm (3”) long. Location: Suisun Marsh, California. Date: 8/8/2007. Photo by Dave Giordano.

Striped bass

Morone saxatilis
Thumbnail. Striped bass, approximately 18 cm (7”) long. Location: Suisun Marsh, California Date: 8/6/2007. Photo by Dave Giordano.

Striped mullet

Mugil cephalus

Surf smelt

Hypomesus pretiosus
Thumbnail. Surf smelt. Location: Eureka Slough, Humboldt Bay, CA. Date: 2004. Photo by Mike Wallace, CDFW.

Tahoe sucker

Catostomus tahoensis
Thumbnail. Tahoe sucker, adult, approximately 15 cm (6”) long. Date: 7/8/2007. Photo by Dave Giordano.

Tecopa pupfish

Cyprinodon nevadensis calidae
Thumbnail. Amargosa pupfish, left side. Photographed at Ash Meadows, Nevada in April 2006. Photo by Joseph C. Sullivan.

Tench

Tinca tinca
Thumbnail. Tench, caught in Storrington, West Sussex, England on 19 August 2009. Photo by Peter Collington.

Thicktail chub

Siphatales crassicauda

Threadfin shad

Dorosoma petenense
Thumbnail. Threadfin shad. Photo by Robert Vincik, CDFW.

Tidewater goby

Eucyclogobius newberryi
Thumbnail. Tidewater goby. Captured from Big Lagoon, CA, on 5/9/2006,  Size: approximately 45 mm long. Photo by Zack Larson, USFWS.

Tomales roach

Lavinia symmetricus subspecies
Thumbnail. California roach. Captured from the Gualala River. Photo by Carl Page, ARS Consulting.

Topsmelt

Atherinops affinis
Thumbnail. Topsmelt, captured from the Santa Clara River Estuary, Ventura County, CA on 28 March 2004. Photo by Steve Howard.

Unarmored threespine stickleback

Gasterosteus aculeatus williamsoni
Thumbnail. Threespine stickleback (armored). Location: Sacramento-San Joaquin River Delta. Date: 16 April 2011. Photo by Christopher Mosser, UC Davis.

Upper Klamath marbled sculpin

Cottus klamathensis klamathensis
Thumbnail. Marbled sculpin, approximately 7.5 cm (3”) long, taken by Lisa Thompson and Daniel J. Drake. Shasta River, California. 12/16/2003.

Upper Klamath-Trinity fall Chinook salmon

Oncorhynchus tshawytscha
Thumbnail. Chinook salmon. Spring-run Chinook salmon (female spawner) swimming in Butte Creek, CA on 14 September 2006. Photo - Lisa Thompson, UC Davi

Upper Klamath-Trinity spring Chinook salmon

Oncorhynchus tshawytscha
Thumbnail. Chinook salmon. Spring-run Chinook salmon (female spawner) swimming in Butte Creek, CA on 14 September 2006. Photo - Lisa Thompson, UC Davi

Wakasagi

Hypomesus nipponensis
Thumbnail. Wakasagi, captured in rotary screw trap on the Sacramento River at Knight's Landing on 2/26/2009. Photo by Dan Worth, CDFW.

Warmouth

Lepomis gulosus
Thumbnail. Warmouth, Sacramento River at Knight's Landing, 12/16/2009. Length approximately 9 cm (3.5 inches). Photo by Kasie Barnes, CDFW.

Western brook lamprey

Lampetra richardsoni
Thumbnail. Western brook lamprey. Location: Prairie Creek, CA. Date: 2011. Photo by Michael Sparkman, CDFW.

Western mosquitofish

Gambusia affinis
Thumbnail. Western mosquitofish, captured in rotary screw trap on Sacramento River at Knight's Landing. Date: 1/29/2009. Photo by Dan Worth, CDFW.

White bass

Morone chrysops
Thumbnail. White bass, caught in Nacimiento Reservoir, CA, by Teejay O'Rear. Photo by Amber Manfree.

White catfish

Ameiurus catus
Thumbnail. White catfish swimming, approximately 21 cm (6”) long. Location: Deer Creek, California Date: 6/20/2007. Photo by Dave Giordano.

White crappie

Pomoxis annularis
Thumbnail. White crappie. Photo courtesy of Corey Geving, webmaster at roughfish.com.

White sturgeon

Acipenser transmontanus
Thumbnail. White sturgeon. Photo courtesy of Professor Peter B. Moyle.

Yellow bullhead

Ameiurus natalis
Thumbnail. Yellow bullhead. Photo by Konrad Schmidt, Nongame Fish Biologist, Division of Ecological Services, Minnesota Dept. of Natural Resources

Yellow perch

Perca flavescens
Thumbnail. Yellow perch, caught in Iron Gate Reservoir, California on 13 May 2009 by Teejay O'Rear. Photo by Amber Manfree.

Yellowfin goby

Acanthogobius flavimanus
Thumbnail. Yellowfin goby, approximately 10 cm (4”) long. Location: Suisun Marsh, California Date: 8/8/2008.

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