S. Tanaka (I), 1912
Heteroscymnus longus Tanaka, 1912
The frog shark is known to grow to at least 143 cm in length.
Fewer than a dozen specimens of this deep water shark have been collected, mostly from the Pacific Ocean. The frog shark has been recorded off the coasts of Japan, New Zealand, and possibly Salas y Gómez, as well as the Nazca Ridge, from as shallow as 120–150 m and as deep as 1,116 m.
The Frog Shark is occasionally caught by trawl, longline, and crab-pot fisheries. As of 2015, there are no current conservation efforts in place.
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