<p>Male California sea lions have been known to assemble at the mouths of fresh water rivers where there is a steady supply of fish. California sea lions tend to feed alone or in small groups unless there is an large quantity of food. Under conditions of increased food supply, <span class="taxon"><em>Zalophus californianus</em></span> hunt in larger groups. <span class="taxon"><em>Zalophus californianus</em></span> have been known to feed cooperatively with cetaceans, seabirds and harbor porpoises. Often one species locates a school of fish and signals the presence of food to the other species. While rare, it has been recorded that California sea lions drink seawater while not breeding (Riedman, 1990).</p>  <p>Foods eaten include: cephalopods, anchovies, herring, Pacific whiting, rockfish, hake, salmon, squid and octopuses (Riedman, 1990).</p>  <p><strong>Animal Foods: </strong>Fish; Mollusks</p>