Usually, when we see fish floating upside down, we assume the worst. But there are some exceptions, like the upside-down catfish. This wonderful species is a quirky addition to any freshwater tank.

This is the amusing moment a fish was seen swimming upside down in an aquarium. Franz spotted his Featherfin squeaker pet swimming the wrong way up in Manila, the Philippines, on August 11. Footage ...

Pay attention to any sudden changes in your fish’s behavior. This could include lethargy, loss of appetite, hiding or unusual swimming patterns. Changes in behavior can indicate underlying stress or ...

The bumpy snailfish, discovered 10,000 feet down off the coast of California, shows that not all denizens of the abyss are frightening. By Alexa Robles-Gil For an animal, surviving in the ocean’s ...