[freshwater] Oder Gasterosteiforme Family Gasterosteidae(Sticklebacks and tubesnouts) Sakhalin stickleback Pungitius tymensis(Nikolskii, 1889). 7 cm TL Korean name/du-man-ga-si-go-gi(두만가시고기)J apanese name/エゾトミヨ(Ezo-tomiyo) Chinese name/圖們江多刺魚 D/spine 10~13, soft ray 9~13. A/spine 1, soft ray 9~10. Scute/4~11.
Distribution; Asia/Duman river in north Korea, Hokkaido, Japan and Sakhalin, Russian Federation. General; Fish with little ecological data. The body elongated and strongly compressed to the side. There are 10 to 13 separate spines in front of the dorsal fin. A membrane is attached to the back of the spine and slightly black in color. The length of the spines are shorter than eye diameter. The eyes are big. The pelvic and anal fins have 1 spine respectively. The upper and lower jaws are similar in length. Bony plates are only on chest area and caudal peduncle and their number is 3-12. Caudal peduncle is very thin. The rear edge of caudal fin is truncated. Dorsal and pectoral fins are light gray. The body ground color is light greenish brown and the belly side is light yellowish green. On the side and back of the body, there are irregular patterns of greenish brown darker than the ground color. Males in the spawning period have their entire body darkened. Adults inhabit lower reaches of weedy streams, feeds mainly on zooplankton, aquatic insects, crustaceans, and earthworms. The spawning season is known from April to July. Nothing is known about the ecological content, but it is estimated to be similar to other congeners. Males build, guard and aerate the nest where the eggs are deposited just above the bottom
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