Aquatic Species

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

Redeye Tetra

Redeye Tetra

Aquatic Species

The Redeye Tetra (Moenkhausia sanctaefilomenae) reaches 5-7 cm as an adult, with a silver-gray body. Very peaceful and fond of schooling, it occupies the mid-upper layers and is easy to keep. It is a close relative of the head-and-tail light tetra and easily confused with it by beginners.

Aquatic Species
Silver Gourami

Silver Gourami

Aquatic Species

The Silver Gourami, also known as the Moonlight Gourami or Silver Man, is an all silver-white, robust fish that is easy to keep - a good beginner ornamental fish. However, newly hatched fry are harder to raise and have a lower survival rate than other gouramis.

Aquatic Species
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Silver Celestial Eye Goldfish

Aquatic Species

The Silver Celestial Eye Goldfish is a variety of Dragon-back goldfish whose eyeballs protrude from the sockets and turn upward and forward toward the sky, hence the name sky-gazing eye. It is a relatively rare goldfish variety.

Aquatic Species
Leaf Fish

Leaf Fish

Aquatic Species

The Leaf Fish (Monocirrhus polyacanthus), also known as the Dead-leaf Fish or Many-spined Leaffish, is native to the Amazon River and Guyana. Its body form is so unusual that when motionless on the substrate it is almost indistinguishable from a fallen leaf.

Aquatic Species
Swallow Beauty

Swallow Beauty

Aquatic Species

The Swallow Beauty, also called the Swallow Beauty Lantern Fish, gets its name from pelvic fins that have mutated into two long, pointed fins shaped like a swallow. It was first discovered by a German aquarist in 1973.

Aquatic Species
Peacock Bass

Peacock Bass

Aquatic Species

The Peacock Bass (Cichla ocellaris), also known as the Crown Three-Band Cichlid, is a large predatory cichlid reaching 30-60 cm as an adult. A fierce carnivore, it should be fed live prey or trained onto fish-meat chunks and must not be kept with smaller tank mates.

Aquatic Species
Chinese Sucker

Chinese Sucker

Aquatic Species

The Chinese Sucker is a peculiar, brightly colored freshwater fish unique to China, also called the Chinese Sailfin Sucker and known as the 'Asian mermaid' in Southeast Asia. A Class II protected species, it is prized by aquarists for its distinctive shape and the auspicious 'smooth sailing' symbolism.

Aquatic Species
Asian Arowana

Asian Arowana

Aquatic Species

The Asian Arowana is a primitive, endangered species known as a 'living fossil' and called 'Dragon Spitting Pearl' in Hong Kong. Resembling the legendary dragon, it is one of the most popular and expensive ornamental fish, distributed across Southeast Asia.

Aquatic Species
Brown Surgeonfish

Brown Surgeonfish

Aquatic Species

The Brown Surgeonfish, also known as the Algae-eating Surgeonfish or Lavender Tang, is a tropical marine fish named for its lavender-purple anal and caudal fins. Reaching up to 21 cm, it inhabits the Indo-Pacific and feeds mainly on algae.

Aquatic Species
Bloodfin Tetra

Bloodfin Tetra

Aquatic Species

The Bloodfin Tetra, also known as the Redfin Fish or Redfin Characin, is named for its silvery-white body and blood-red fins. Native to Argentina, it is a lively, schooling fish that is very easy to keep, requiring only stable water quality and nutritious food.

Aquatic Species
Wrought Iron Butterflyfish

Wrought Iron Butterflyfish

Aquatic Species

The Wrought Iron Butterflyfish, also known as the Black Discus, is a striking marine fish with a black body covered in white-edged scales that look like sequins. Native to the northwestern Pacific, it is a beautiful but challenging species best left to experienced aquarists.

Aquatic Species
Panda Corydoras

Panda Corydoras

Aquatic Species

Native to Peru and now captive-bred, the Panda Corydoras is a small but very well-known corydoras catfish, named for its panda-like coloration.

Aquatic Species

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