It lives in the sea around Hokkaido, the Sea of Japan north of Yamaguchi Prefecture, the Pacific Ocean north of Choshi that East Chiba Prefecture, and offshore of Sakhalin and Alaska. Its body is long and slightly thin. The body surface
is slimy. The mouth is very small, eating small amphipods and polychaetes. It's slightly delicious when you dry it and grill it. The name originates from fins that all of those are black. Another species of willowy flounder Tanakius kitaharae (Jordan & Starks, 1904) inhabits in Tohoku region in Japan without black fins, and these dried adult females are exquisite and very high-grade fish (G. stelleri is inexpensive).
There are many kinds of fish living in the ocean. We can identify the species by the slight differences in patterns. It is relatively easy to identify the species of adult fish, but it is difficult to identify the species
of juvenile fish. I would like to contribute to SDG 14 (LIFE BELOW WATER) by letting as many people as possible know how interesting and important marine biodiversity is.
The United Nations has designated the decade starting in 2021 as the "Decade of Ocean Science," with the aim of contributing to SDGs. Ocean science, as defined by the UN, includes the field of fisheries.