Often regarded as the king of the freshwater aquarium, discus fish are one of the most beautiful species of aquarium fish; and one of the hardest to keep.

Dottyback are a family of small saltwater fish made up of over 100 distinct species. They are hardy, intelligent and vibrantly colored, making them popular

Pacu fish are a large family of freshwater fish related to the piranha. While some species look like piranhas, they are herbivores and are peaceful fish.

A relatively hardy and easy to care for livebearer, the swordtail is one of the most popular aquarium fish species among beginner aquarists.

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.

Oscars are one of the most popular species of freshwater fish in the aquarium hobby today. They are also a highly intelligent species of fish.

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

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

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

Flagfish are a small fish that are semi-aggressive in nature. These fish may not do well if multiple males of the same species are kept together.

Gourami are a relatively hardy species of freshwater aquarium fish and are thus suitable for most intermediate aquarists. Square shaped, compressed body.

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.

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.

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

Knifefish are a fascinating species of freshwater fish belonging to the eel family. They are characterized by their long, tapered bodies and anal fins.

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.

Mbuna cichlids are some of the most brightly colored freshwater fishes in the world, exhibiting a wide range of colors and patterns.

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

One of the most commonly available species of freshwater aquarium fish, the guppy is a long favorite amongst aquarium enthusiasts worldwide.

The ray fish''s skeleton is made up entirely of cartilage and it is characterized by its flattened body and large pectoral fins which are fused to its head.

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

Angelfish are one of the most popular species of freshwater fish in the aquarium hobby. They are characterized by their vertically compressed bodies.

Loaches are a large family of highly intelligent freshwater fish. There are over 200 different species and they are characterized by their eel-like bodies.

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.

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

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

African Tiger Fish are a large and predatory species of fish. Their bodies are powerful and streamlined, enabling them to move with fast bursts of speed.

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

Species belonging to the genus Naso are typically referred to as unicornfish because they have a long pointed protuberance in the middle of their heads.

There are nine species of Asian cichlids which can be found in Lebanon, Israel, Syria, Iran, India, and Sri Lanka. These cichlids are mouth brooders.