Characterized by their long bodies and similarly elongated jaws, gar are kept in large aquariums and require very specialized care by experienced aquarists.

Sometimes referred to as dragonets or mandarinfish, mandarins are small, brightly colored saltwater fish belonging to the Synchiropus genus.

The glass fish is a fascinating species of aquarium fish. Its most astounding feature is its transparent body which reveals its bones and internal organs.

Batfish are a family of marine fish, similar in appearance but unrelated to the angelfish. Juveniles are characterized by their bat-like side profile.

Pufferfish are a large family of saltwater fish. It can fill its elastic stomach with water until it expands to a large, almost globe-like shape.

Hap cichlids exhibit a wide variety of colorations and patterns ranging from solid blue to multicolored combinations of red, orange, and purple.

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

The Neon tetra is an incredibly beautiful species of tropical freshwater aquarium fish. Neon tetras usually grow up to around 1.2 inches in length.

Killifish are a large family of freshwater fish comprising over a thousand different species. Most species are no more than an inch or two in size.

Blennies are a species of marine fish made up of 6 distinct families. They are characteristically small in size and are similar to gobies in appearance.

A unique fact about Trunkfish: they secrete a poisonous material from their skin which acts as a chemical defense mechanism against predators.

Basslets are a small family of marine fish. Most species of basslet rarely exceed 4 inches in length and are known for their vibrant colorations.

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.

Halfbeak fish are a type of marine and brackish water fish belonging to the family Hemiramphidae. They are a little less colorful than some marine species.

Archerfish are one of the most fascinating species of brackish water aquarium fish. They get their names from shooting insects with powerful jets of water.

Damselfish are a colorful species of saltwater fish popular in the modern saltwater aquarium hobby. They come from tropical coral reefs around the world.

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

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

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

Seahorses are characterized by their equine appearance. Its upper body is shaped like the head of a horse and its lower body ends in an elongated tail.

There are more than 250 species of Lake Tanganyika cichlids that have been identified, in a wide variety of colors and patterns.

Betta Splenden fish are one of the hardiest species of freshwater aquarium fish and are an incredibly popular mainstay among hobbyists.

Anglerfish are a family of predatory fish consisting of over 200 separate species. They are characterized by their rod-like growths called illicium.

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

Saltwater sharks are some of the most majestic and most dangerous species kept in the aquarium hobby. They are only recommended for advanced hobbyists.

There are several species of fish that carry the ""drum"" name. With more than 250 species, drum fish exhibit a wide range of colors and patterns.

The species known as frogfish are all members of the family Antennariidae which is sometimes known as the anglerfish family, especially in Australia.

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.

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.

Grouper are a large family of saltwater fish characterized by their stout bodies and over-sized mouths. They are hardy, colorful and fascinating species.