| Gasterosteidae (Sticklebacks and tubesnouts) |
| 7.23 cm SL (male/unsexed); 7.88 cm SL (female) |
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benthopelagic; freshwater; brackish; marine |
| North Pacific: coastal Japan facing the Sea of Japan from Kyushu to Hokkaido Islands, along the Pacific coast of northern Japan from Chiba Prefecture to Hokkaido, along the Sea of Okhotsk of Hokkaido, Japan, west to the southern and eastern coasts of Korean Peninsula, the Maritime Territory and north to Sakhalin Island, Russia. |
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Dorsal spines (total): 3-3; Dorsal soft rays (total): 10-15; Anal soft rays: 7-11; Vertebrae: 30-34. Gasterosteus nipponicus is distinguished from its congeners by the combination of the following characters: lateral plates complete, abruptly reducing in size above the anus, depth of lateral plate above the anus <60 % that of the deepest plate; and caudal keels thin and membranous (Ref. 96096). |
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Least Concern (LC); Date assessed: 17 February 2020 Ref. (130435)
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| harmless |
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