Sakhalin sturgeon
A species of sturgeon (Acipenser mikadoi) found in the Northwest Pacific, including waters around Japan and Sakhalin. Typically written in katakana as ミカドチョウザメ.
The Sakhalin sturgeon is designated as an endangered species.
There are reports that Sakhalin sturgeon have been caught off the coast of Hokkaido.
Katakana spelling is standard for this species name; usually written in kana.
Kanji spelling is very rare and may not be widely recognized; lists it but gives no priority.
The name combines ミカド (emperor) and チョウザメ (sturgeon). The exact origin of the 'emperor' element is uncertain, but it likely reflects a majestic or notable quality attributed to this sturgeon species.