Fish Species

Fish Species by Watersheds : 'Upper Arroyo Las Positas-180500040202'

Freshwater native and non-native fish species present currently and/or historically, determined from the PISCES database (Feb. 26, 2014).  Some species, such as salmon or steelhead, may no longer be present upstream of dams that lack fish passage.

Yes/No corresponds to California native species

Central Coast Coho Salmon

  • Oncorhynchus kisutch
  • Yes

  • 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”).

Hardhead

  • Mylopharodon conocephalus
  • Yes

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

Redear Sunfish

  • Lepomis microlophus
  • No

  • Thumbnail. Redear sunfish. Photo courtesy of Professor Peter B. Moyle.

Sacramento Blackfish

  • Orthodon microlepidotus
  • Yes

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

Sacramento Pikeminnow

  • Ptychocheilus grandis
  • Yes

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

Sacramento Sucker

  • Catostomus occidentalis occidentalis
  • Yes

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

White Crappie

  • Pomoxis annularis
  • No

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