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.

Many fish enthusiasts love Black Kuhli Loaches for a variety of reasons. They’re a relatively hardy and peaceful species, so ...

The city-owned aquarium in Gardner’s Basin finally reopened this week after five years of renovations and repairs.

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 ...