Koi are one of the most popular types of pond fish. Their bodies, which are long and powerful, are very similar to that of the wild carp.

Pipefish are a species of saltwater fish related to seahorses. However, the pipefish''s body, unlike the seahorse''s, is long, straight and snake-like.

Parrotfish are a marine fish with over 90 distinct species. They are characterized by their parrot-like beaks that are made of tightly compressed teeth.

Freshwater sharks are a group of freshwater fish belonging to the minnow family. Freshwater sharks have long, powerful bodies and large dorsal fins,

Dartfish are a family of small, colorful saltwater fish. They are similar in appearance to gobies and are characterized by their long, eel-like bodies.

The Moorish idol is closely related to surgeonfish. These fish are characterized by their vertically compressed, disk-like bodies and bold colorations.

Most acara cichlids are somewhat aggressive and territorial and they have a tendency to eat smaller fish. Acaras come in a wide range of colors.

Tangs are a highly popular species of saltwater aquarium fish. They are characterized by their laterally compressed bodies and scalpel-like spines.

Platies are fairly small fish, growing no more than 3 inches long, and they are very peaceful and non-aggressive. These fish are usually drab in color.

Piranha are a family of extremely aggressive freshwater fish. They are characterized by two rows of extremely sharp, triangular shaped teeth.

Rasboras are a family of minnow-type freshwater fish characterized by their small bodies and vibrant colorations. They are an extremely peaceful fish.

Triggerfish are a fish comprised of roughly 40 distinct species. They are characterized by their laterally compressed bodies and comparatively large heads.

Cardinalfish are a large family of saltwater fish made up of over 200 sub-species. Most species are extremely colorful and are a couple of inches in length.

Also referred to as wreckfish, reef fish, swallowtails and jewelfish, anthias are a large family of saltwater fish of over 200 different sub-species.

Snappers are generally non-aggressive fish that do well in very large saltwater community tanks. Most live in rocky or coral reefs, and come in many colors.

Catfish are a large family of freshwater fish extremely popular in the aquarium trade. Extremely hardy and make for fascinating aquarium specimens.

Gobies are one of the largest families of fish comprised of over 2000 separate species. Most species rarely grow more than a couple of inches in length.

African cichlids are considered to be one of the most diverse, intelligent, active and colorful families of freshwater fish in the modern aquarium hobby.

Hogfish are a reef-dwelling species of wrasse popular in the modern aquarium trade. They possess a long, pig-like snout they use to search for food.

Sometimes referred to as the dragon fish, arowana fish are one of the most beautiful and most fascinating species of fish in the aquarium trade.

Rays are a large group of fish closely related to sharks. Ray fish are characterized by their flat bodies and a tough, elastic skeleton made of cartilage.

The Tigerfish is a type of freshwater fish belonging to the genus Datnioides (Datnoids). It''s named for the vertical stripes that run all along its body.

Goldfish are one of the first species of fish to be domesticated and are also one of the most commonly kept aquarium pets. Peaceful and hardy fish breed.

The flounder is also known as a flatfish; a fitting name because its body is laterally compressed and it lays on its side, burrowing into the substrate.

The species known as surgeonfish belong to the Acanthuridae family. Surgeonfish vary greatly in size from one species to another.

Saltwater Goby Fish are a large family of fish made up of over 2000 distinct species. Most species of saltwater goby fish are extremely small in size.

Barbs are a large family of freshwater fish that are a popular choice in the aquarium hobby. Different species of barbs come in a dazzling array of colors.

Freshwater hatchetfish are a type of ray-finned fishes belonging to the family Gasteropelecidae. There are three genera, with nine different species.

Puffer fish are a curious species of brackish water fish. They are characterized by their almost box shaped bodies and somewhat comical swimming movements.

Snakeheads are a species of tropical fish popular among experienced aquarists. They get their name from their flattened shape and the scales on their head.