Pacific salmon shark, Lamna ditropis

Pacific salmon shark           Occurs commonly at Primorye coasts, most frequently in northern areas. Is up to 3.6 m long and mass over 300 kg. The normal length in catches ranges from 1.5 to 2.5 m. This species inhabits open and coastal waters of the temperate zone of the northern Pacific, the Sea of Japan being the southern border of its range. Often swims at the surface, sometimes sticking out its dorsal and caudal fins; can jump above sea surface. Active pelagic predator. Feeds on numerous commercial fish species, viz. herring, mintai, cod, rock trout and Cephalopod mollusks. During salmon running, often accumulates near river estuaries, and for this reason is also called salmon shark. Sometimes gathers in schools comprising 20-30 specimens. The shark has a blunt, wide mug with large sharp notchless teeth. The back is dark, and the abdomen light with dark spots.  Viviparous species, casting out from two to five well-formed young, lengths ranging from 50 to 70 cm.
    As a commercial species, is in great demand in Japan and China. Used as food raw. Caught with gill nets and hook rigging. At Primorye shores, the commercial significance of this shark is small.  As additional catch, it is sometimes noted in catches of vessels that fish mintai, salmon and other fish species with pelagic trawl nets.