The gold fish is a domesticated carp primarily raised as aquarium fish. Contrary to its name, a gold fish appears in a wide variety of colors. The fish can be ...

Koi, sometimes called Japanese carp, are essentially, ornamental fish. They look much like large goldfish although they have different ancestry. Goldfish were developed from Prussian carp in China and Koi ...

Sturgeon is the common name used for some 26 species of fish in the family Acipenseridae, including the genera Acipenser, Huso, Scaphirhynchus and Pseudoscaphirhynchus. The term includes over 20 species ...

Catfish (order Siluriformes) are a diverse group of ray-finned fish. Named for their prominent barbels, which resemble a cat's whiskers, catfish range in size and behavior from ...

Sharks (superorder Selachimorpha) are a type of fish with a full cartilaginous skeleton and a highly streamlined body. The earliest known sharks date from more than 420 million years ...