Gasterosteus Nipponicus (Gasterosteus nipponicus) is a ray-finned fish of the family Gasterosteidae. It inhabits diadromous, migrating between freshwater and the sea waters. This species can reach a maximum total length of 7.2 cm. With a trophic level of 3.3, it is a low-level carnivore, feeding on invertebrates and small organisms. It is assessed as Least Concern on the IUCN Red List.
Dorsal spines (total): 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
Behavioural data for Gasterosteus Nipponicus is currently being reviewed.
Marine; freshwater; brackish; benthopelagic. Subtropical west to the southern and eastern coasts of Korean Peninsula, the Maritime Territory and north to Sakhalin Island, Russia.
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