![]() Their southern range extends as far south as the San Lorenzo River in California, and ocean catches have been made as far south as Del Mar, California. California, Oregon, and Washington have some small runs in a few streams and rivers, but the only state which has large chum runs is Alaska, where chum are an extremely important commercial fish and provide a limited but growing sport fishery. The caudal fin is slightly forked.Ĭhum salmon are not well distributed along the West Coast. The number of rays in each of the fins are: dorsal, 10-13 anal, 13-17 pectorals, about 16 and, pelvics, about 10 (each of the abdominal fins have a free tipped fleshy appendage above its insertion). ![]() Scales are cycloid with 130 to 153 scales above the lateral line, and 126 to 151 on the lateral line.Īdipose fin is small, slender, and fleshy. Caudal peduncle is moderately compressed, rather slender, its least depth about 14 into standard length. The first gill arch has from 18 to 26 smooth and widely spaced gill rakers. Gill membranes are free of each other and of the isthmus. Eye diameter is about 6.7 into head length. Interorbital space is high, wide, convex, rounded, its width about 2.6 into head length. Teeth in both jaws become large and canine (fang-like) in spawning males (hence the vernacular name of dog salmon). There are no teeth on the basibranchials. Lips are fleshy with well developed teeth in both jaws, on the head and shaft of the vomer, palatines, and tongue. Snout is narrowly rounded in profile (in spawning males the snout is greatly enlarged and hooked). The upper jaw reaches almost to the posterior margin of the orbit. Mouth is terminal, large, and directed upward. ![]() The head is conical with head length about 4.4 into standard length. The body is elongate, somewhat compressed, depth about 3.8 into standard length, and deepest behind tip of pectoral fin.
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