Most information about the Porthole Livebearer is gathered from aquarium fish but wild populations are known to exist near the Salton Sea. They have been found in drains with salinities up to 18 ppt and temperatures as high as 26-28°C and seem to prefer shallow, flowing waters. They are an omnivorous species and will eat from both the bottom and water column of their chosen area. Most only live to be a year old, growing to approximately 75 mm. Males are mature by the time they are 22-25 mm and will defend small territories to attract females. Females do not mature until they reach 36 mm in length. Females can hold between 1 and 140 embryos at a time and can reproduce all year long in the right conditions. In the Salton Sea these conditions are only found during the summer and therefore reproduction does not occur during the winter in California.
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