CORAL Mystery Fish – October 2, 2020. Image by Jordann Tomasek, courtesy Birch Aquarium at Scripps Institution of Oceanography.

Hint: It comes from Down Under in temperate waters, and this is a male of the species.

Hint #2: It’s currently on display with its mate at the Birch Aquarium at Scripps, La Jolla, California.

Click for answer.

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