Polluted rivers are disrupting swordtail fish mate choice, causing two species to hybridize and highlighting a hidden threat ...

The pearly razorfish (Xyrichtys novacula) is a small marine animal that lives in sandy coastal waters and feeds on creatures ...

Another expert reader explores this thorny topic, including reference to the behaviour of their own archerfish ...

Sea lampreys have terrorized Great Lakes fish populations for decades, latching onto hosts and draining them like aquatic ...

With razor sharp teeth, armor like scales, and a body that can grow longer than a person is tall, the alligator gar looks ...

There’s a new fish species in Alabama, but you can’t see it. In fact, as far as scientists know, this fish only lives in one cave in north Alabama that is closed to the public. “There were all these ...

There’s something oddly calming about watching fish move through water. No notifications, no noise, no rush – just a small world inside glass, carrying on quietly. Maybe that’s why freshwater ...

Since passage of the Endangered Species Act 50 years ago, more than 1,700 plants, mammals, fish, insects and other species in the U.S. have been listed as threatened or endangered with extinction. Yet ...