Special Exhibit: Kunimasu Trout, Once Thought Extinct (black kokanee) Read about it here.

[企画展示室] よみがえった魚: クニマス
Oct. 26 – November 24, 2013

Five artificially-hatched kunimasu trout, originally endemic to Lake Tazawa in Akita Prefecture, were exhibited. Kunimasu was thought to be extinct since the 1940s when Lake Tazawa became too acidic due to man-made causes. In 2010, kunimasu was rediscovered in Lake Saiko at the foot of Mt. Fuji in Yamanashi Prefecture.

Apparently, they successfully bred from eggs sent to Lake Saiko in 1935. Local fishermen knew about the fish, but did not know it was kunimasu. Sensational fish story.
Extinct in Lake Tazawa, Oncorhynchus kawamurae
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