Aquatic Species

Encyclopedia of freshwater, tropical, and saltwater fish species — learn about water quality requirements, tank mate compatibility, and breeding techniques.

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Onion Snail

Aquatic Species

The Onion Snail is rare in species, mostly spherical with a thin, brittle shell. The shell surface is plain and translucent, abundant in tropical soft-coral reefs, with a few in the deep sea.

Aquatic Species
Kissing Gourami

Kissing Gourami

Aquatic Species

The Kissing Gourami (Helostoma temminckii), also called the Kissing Fish, is a common, well-known tropical ornamental. Many think its 'kissing' shows love, but it is actually territorial fighting.

Aquatic Species
White Corydoras

White Corydoras

Aquatic Species

The White Corydoras is native to South American waters and is now mostly captive-bred. An albino form of the Bronze Cory, it has a milky white body with clear red eyes, is gentle, and is kept in schools. Egg-laying and good with small fish, it suits planted tanks as a bottom fish.

Aquatic Species
Aegean Killifish

Aegean Killifish

Aquatic Species

The Aegean Killifish (Aphyosemion celiae) is native to West Africa and shaped like the harp killifish, 6-7 cm long. It likes weakly acidic water and higher temperature (optimal 24-28 C), eats live foods like bloodworms and artemia, and is hardy and easy to keep.

Aquatic Species
Brown Oranda with Curled Opercula

Brown Oranda with Curled Opercula

Aquatic Species

In goldfish, curled opercula is usually a disease sign, but the Brown Oranda with Curled Opercula has gill covers that grow everted from inside out like a wound - a hereditary variation.

Aquatic Species
Sunburst Butterflyfish

Sunburst Butterflyfish

Aquatic Species

The Sunburst Butterflyfish (Chaetodon kleinii) is pale tea-colored in front and dark yellow behind. Though not vivid at depth, it is liked by some aquarists and can mix with other butterflies, including its own kind, if added together.

Aquatic Species
Cinnabar-eye Big Butterfly-tail Goldfish

Cinnabar-eye Big Butterfly-tail Goldfish

Aquatic Species

The Cinnabar-eye Big Butterfly-tail Goldfish is a goldfish variety with a pure white belly and only cinnabar-red eyes, very striking. Gentle, it is beloved by hobbyists.

Aquatic Species
Brown Oranda with Red Head

Brown Oranda with Red Head

Aquatic Species

The Brown Oranda with Red Head is a goldfish variety, a rather precious one of the Wen-jin group. Because it resembles the Purple Oranda, care is needed when buying to tell them apart.

Aquatic Species
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Pearl Lined Lamprologus

Aquatic Species

The Pearl Lined Lamprologus (Neolamprologus tetracanthus) is mainly distributed in Lake Tanganyika, favoring the boundary of rock and sand. A cichlid with strong territoriality and fast growth, it is best kept alone.

Aquatic Species
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White-face Butterflyfish

Aquatic Species

The White-face Butterflyfish (Chaetodon mesoleucos), also called the White-face Butterflyfish, has a white face with complex colors behind it, giving the name 'white-face butterflyfish'. Unfriendly to its own kind, it is not suited to gentle community fish.

Aquatic Species
Pearl Gourami

Pearl Gourami

Aquatic Species

The Pearl Gourami is a common ornamental fish, named for pearl-like spots covering its body and fin edges. Its stately look makes it popular with aquarists.

Aquatic Species
Pearl Stingray

Pearl Stingray

Aquatic Species

The Pearl Stingray (Potamotrygon motoro), also called the Amazon River Stingray, is a common stingray in aquariums. Its charming pattern of round cream spots like pearls gives the name 'Pearl Stingray'.

Aquatic Species

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