Fish caught are principally sardines, bonito, mackerel smelt and sprats. Sports fishing includes salmon, whitefish, smelt, lake trout and walleye being major catches. Sardines, anchovies, haddock, smelt, Atlantic cod and other shoal-forming species are eaten. Walleye, trout, and other larger fish prey on these smelt. Many fish species are transitory, of which commercial value have smelt, vendace and partly salmon. Sportfish in the lake include yellow perch, trout, smelt and pike. Common non-indigenous fish species include the rainbow smelt, alewife, white perch and common carp. Some sportsmen also ice fish for smelt. California herons were found to live mostly on sculpin, bass, perch, flounder, and top smelt. Examples include whitebait of all sorts, anchovies, and smelt. Other spawning animals which are semelparous include mayflies, squid, octopus, smelt, capelin and some amphibians. The most popular catch is cultivated carp, followed by smelt and goby. The majority of their diet consists of vendace, smelt, perch and roach. The rainbow smelt is widespread across North American watersheds. The body of the rainbow smelt is slender and cylindrical.