Neon tetras get along with most other small tropical fish, including swordtails, danios, and gourami. Swordtails are live-bearers that come in a wide range of bright colors. Males have an extended ...

Also known as Galaxy Rasboras, Celestial Pearl Danios are another bright tropical fish you can keep in a smaller habitat.

Zebrafish (Danio rerio) have been maintained at the University of Sheffield since 1997. Today, the Biological Services Aquarium (BSA) has the capacity to hold over 112,000 fish, in over 4000 tanks and ...