Fish are vertebrates (vertebrates have backbones) that live in water. They breathe using special organs called gills.

Many kids turn up their noses at the thought of eating fish because, well, it can smell “fishy.” While it is usually a healthful source of protein in the diet, there may be several reasons to avoid …

Soar into the world of flying fish. Find out how their amazing talents—that may be used to avoid predators—can sometimes get them in trouble.

What is a flatfish? No misnomers here. Flatfish are exactly what they sound like: fish with thin, oval or diamond-shaped bodies that are lie flat on the seafloor.

In this episode of What Sam Sees, Sam meets a fish that looks like a balloon with a spiky attitude. Swim with Sam in the National Aquarium’s Atlantic Coral Reef in Baltimore, Maryland, to learn …

Once prey is found, electric eels will use a much stronger shock to stun prey, usually smaller fish. Electric eels can grow up to 8 feet (2.5 meters) in length. Despite their appearance, electric …

These animals belong to a family of fish that have long, flat rostrums—or snouts—with sharp teeth sticking out around the edges. Related to sharks and rays, sawfish use their rostrums to dig …

Anglerfish Common Name: Anglerfish Scientific Name: Lophiiformes Type: Fish Diet: Carnivore Group Name: School Size: 8 to 40 inches

Do deep sea fish sleep? Even in the ocean’s depths, where sunlight never reaches, fish still probably undergo some form of rest—though it may not look like anything we’re used to.

Northern resident orcas specialize in hunting salmon, while white-sided dolphins eat small fish, such as herring and anchovy.