A humpback anglerfish (Melanocetus johnsonii)—a species known as a black seadevil—was spotted off the coast of Tenerife. This terrifying deep-sea fish is typically found at depths of 200 to ...

Its vibrant colors and gentle demeanor make it a delightful addition to any aquarium. The Harlequin Rasbora is a small freshwater fish with a distinctive black triangular patch on its orange-red body.

The black seadevil ... said Kory Evans, a fish biologist at Rice University. “I thought it was A.I.” Bruce Robison, a senior scientist at the Monterey Bay Aquarium Research Institute, added ...