Sakhalin taimen (Hucho perryi)
… also called the Stringfish, Japanese huchen, or Ito, is a species of fish in the salmon family (family Salmonidae) of order Salmoniformes. Sakhalin taimen is one of largest, most ancient salmon species and primarily inhabitats the lower to middle reaches of lakes and rivers.
Fishes over 30 cm long are almost exclusively piscivores, while the young feed mostly on aquatic insects. Females typically lay between 2,000-10,000 eggs in the spring on the sandy or gravelly river bottom. The average specimen caught have weighed around 5 kg (11 lb).
The global population of Sakhalin taimen has dwindled in recent years for a variety of reasons. The loss of more than 50% of their original habitat due to agriculture, urbanization, and more recently oil and gas development, is a major factor. Other considerable pressures include bycatch in the commercial salmon fisheries of Russia and Japan, as well as illegal fishing practices in Russia. The fish are also prized as trophies by Japanese recreational anglers…
(read more: Wikipedia)
(illustration from Notes on some figures of Japanese fish : taken from recent specimens by the artists of the U. S. Japan expedition, 1856, James Carson Brevoort)