Featured Article: Black Tetra
The Black Tetra is a two-inch long fish that's easy to care for. Find out how, plus learn how these fish look their best in your aquarium. See more »
aquarium fish library
Aquarium fish can differ from their counterparts in oceans and streams and owners should be aware. Learn about some common and not so common aquarium fish, such as the Egyptian Mouthbrooder, Penguin Fish, and Tiger Barb.
Dwarf Rainbowfish
The Dwarf Rainbowfish comes from northern Australia and Papua New Guinea and often boasts beautiful shades of yellow and green. Learn more about the Dwarf Rainbowfish.
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Dwarf Sucking Catfish
The Dwarf Sucking Catfish is small and prefers to stay toward the bottom of the tank. He'll help you out, too, by eating algae that grows quickly in aquariums.
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Egyptian Mouthbrooder
This small cichlid is very peaceful, as long as its companions are too large for it to swallow! Learn about the Egyptian Mouthbrooder.
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Firemouth Cichlid
This fish has a brilliant red underside, a smoky gray upper body, and dark splotches scattered along its flanks. It can be a bit territorial, so read this article to learn how to give the proper care.
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Freshwater Aquarium Fish
Choosing the right fish for a freshwater aquarium depends on a number of factors, including the tank's size, the fish's diet, and more. Our fish profiles will allow you to select the perfect blend of fish, no matter how large or small your aquarium.
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Glass Catfish
Although popular for its luminescent color, the Glass Catfish, which grows to four inches, is not as hardy as many other aquarium fish. If you want to try keeping this fish, read our article for advice.
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Glowlight Tetra
These fish get their name from their iridescent coloring that shows best in low light. Learn how to care for the Glowlight Tetra.
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Golden Barb
No one quite knows where this species came from, although its relatives are quite popular. Learn about the mysterious Golden Barb.
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Guppy
The Guppy is a live-bearer, meaning it does not lay eggs but produces live offspring. Read about the guppy, one of the most common and popular aquarium fish.
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Harlequin Rasbora
The Harlequin Rasbora needs a peaceful environment away from more aggressive fish. Find a profile and picture of the Harlequin Rasbora.
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Head and Tail Light Tetra
The Head and Tail Light Tetra, also referred to as the Beaconfish, races around the aquarium autobahn. Find a profile of the Head and Tail Light Tetra.
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How to Care for Aquarium Fish
If you've ever had a pet fish that died quickly, you may be surprised to learn that the normal lifespan of most aquarium fish is measured in years! Find out how to keep your fish alive and well in this article.
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Keyhole Cichlid
The Keyhole Cichlid has an irregular blotch on its side that resembles a keyhole. Find out more, including a profile and picture of the Keyhole Cichlid at HowStuffWorks.
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Kissing Gourami
The Kissing Gourami does not kiss as a sign of affection, rather the behavior is used to settle minor disputes. Read more about the Kissing Gourami.
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Madagascan Rainbowfish
The Madagascan Rainbowfish likes to be near the surface, so it's a good choice for the upper levels of a tank. Read about the Madagascan Rainbowfish.
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Marbled Hatchetfish
The Marbled Hatchetfish claims it domain at the top of the tank and can easily flip out. Read more about the distinctly-shaped Marbled Hatchetfish.
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Neon Tetra
The Neon Tetra needs no light show to sport its small multicolored body. Read more about the very popular and colorful Neon Tetra at HowStuffWorks.
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Orange Chromide
The Orange Chromide is a member of the large, popular Cichlid family and fits comfortably in most community tanks. Learn about the hardy Orange Chromide.
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Paradise Fish
First imported into Europe about 150 years ago, the Paradise Fish is able to take air directly at the surface of the water. Read more about the tropical Paradise Fish.
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Pearl Gourami
The Pearl Gourami has a deep body that is heavily peppered with shimmering silver spots, extending into the fins. Learn more about the spotty Pearl Gourami.
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