Lumpfish are small, rounded fish with a thick, bumpy skin that resembles a lumpy rock. They have a sucker on their belly, ...

Tetras are one of the most popular and diverse types of freshwater aquarium fish. With more than 150 unique types of tetra ...

Thresher sharks are back off the Seacoast—sleek, strange, and swinging nine-foot tails.

The "kings" of freshwater aquariums, Discus fish are known for their stunning looks. With stable warm temperatures and clear ...

Xiphophorus comes from the Greek words for “sword” and “to carry.” Fish in this genus either have long, elongated tail fins that resemble swords or regular, rounded tail fins.

Loaches include a wide variety of fish, but are typically small and found in freshwater systems. They are typically nocturnal, according to Britannica, and use their barbels to sift through the bottom ...

But they also use the long upper section of their tail fin, which can grow up to 10 feet (3 meters) long, to hunt. Related: Thresher sharks have the longest tails in terms of absolute length.

From DeSoto and Dodge to George Barris and Cadillac, the stretched American tail was inspired by the space race.

How fast does a fish disappear? How long does it take to erase all evidence of its life, to turn it into a fillet? What about ...

These fish flap their enlarged, triangle-shaped pectoral fins to fly through the water and migrate over long distances.

Researchers have discovered a long, slender new species of catfish from southern Brazil that, over time, has lost some of its fins. Listrura elongata is a fossorial, or burrowing, species that has ...

Researchers have uncovered new details about how some fish can regenerate their tail after an injury, which could inch us closer to employing regenerative medicine in people. “Humans have all ...