Aquatic Species

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

Needlefish

Needlefish

Aquatic Species

The Needlefish (Xenentodon cancila) is native to southern Asia - India, Sri Lanka, Thailand, Malaysia - but is now endangered. Slender like a silver rod, its protruding beak-like jaws give the name 'needle fish'.

Aquatic Species
Showa Sanshoku

Showa Sanshoku

Aquatic Species

Showa Sanshoku is a very important koi variety. Like Taisho Sanshoku it is made of black, red, and white, but Showa is based on black, overlaid with white and red.

Aquatic Species
Platy (Moonfish)

Platy (Moonfish)

Aquatic Species

The Platy (Moonfish, Xiphophorus maculatus) is a common tropical fish. Like the guppy it is small and comes in many colors, beloved by aquarists. With strong adaptation and breeding ability, it is easy to keep.

Aquatic Species
Ingot Red Goldfish

Ingot Red Goldfish

Aquatic Species

The Ingot Red Goldfish is a goldfish variety whose head red patch has a rear edge curving inward like an ancient ingot, a very unique form beloved by goldfish fans. Like goldfish it is gentle and can be kept with other gentle fish.

Aquatic Species
Featherfin Bannerfish

Featherfin Bannerfish

Aquatic Species

The Featherfin Bannerfish (Heniochus chrysostomus), mainly from the Indo-Pacific coral reefs, is also called the Feather Knife. Named for its feather-like tall dorsal fin, it eats invertebrates and coral polyps, so care is needed in the tank.

Aquatic Species
Glowing-scale Butterfly-tail Goldfish

Glowing-scale Butterfly-tail Goldfish

Aquatic Species

The Glowing-scale Butterfly-tail Goldfish is a goldfish variety whose special coloration interweaves black, white, and red patches like a Chinese ink painting, earning it the nickname 'landscape-painting butterfly tail'.

Aquatic Species
Cherry Barb

Cherry Barb

Aquatic Species

The Cherry Barb (Puntius titteya) takes its name from its cherry-red color, which deepens in mature males. Gentle and well suited to planted tanks, it is a popular ornamental fish.

Aquatic Species
Severum Cichlid

Severum Cichlid

Aquatic Species

The Severum (Cichlasoma severum), also known as the Pineapple Fish, originates from Guyana, Brazil, and the Amazon basin and was introduced to China in the 1990s. With a distinctive look and robust body, it is gentle except during breeding and is a popular cichlid.

Aquatic Species
Triangle Butterflyfish

Triangle Butterflyfish

Aquatic Species

The Triangle Butterflyfish (Chaetodon triangulum) is native to the coral reef waters of the Indian Ocean and is very beautiful. As a marine fish it is somewhat challenging, so providing suitable saltwater conditions is essential.

Aquatic Species
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Arcuate Corydoras

Aquatic Species

The Arcuate Corydoras (Corydoras arcuatus), also called the Indian Cory, Arched-back Cory, or Arrow Cory, is a common, well-known cory species that is robust and easy to keep, and is well suited to schooling in the aquarium.

Aquatic Species
Common Hatchetfish

Common Hatchetfish

Aquatic Species

The Common Hatchetfish (Gasteropelecus sternicla) is best known for its bulging, belly-like abdomen and is a common ornamental fish. Gentle and a surface-dwelling species, it suits tanks with floating plants.

Aquatic Species
Bala Shark

Bala Shark

Aquatic Species

The Bala Shark (Balantiocheilus melanopterus), native to Thailand and the Indonesian islands of Sumatra and Borneo, is a popular ornamental fish thanks to its silvery beauty and robust, easy-to-keep nature.

Aquatic Species

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