What Is a Celestial Pearl Danio? Danios are tiny fish that live in Southeast Asia. Most prefer small streams. There are at least 25 different species of Danio, and the largest is only about 3 1/2 ...

Most small aquarium fish thrive in schools and need a minimum tank size of 10 to 30 gallons, depending on the species. Many species, like livebearers, can quickly multiply in an aquarium setting, ...

BETHESDA, Md (Nov. 27, 2006) – Two fish that share much in common genetically appear to have markedly different abilities to grow, a finding that could provide a new way to research such disparate ...

The group of Christiane Nüsslein-Volhard at the Max Planck Institute for Developmental Biology in Tübingen has identified a gene that is partly responsible for the different patterns found in closely ...

Similarities in how different organisms look can indicate a close evolutionary relationship. Conversely, great differences in appearance can suggest a very distant relationship, as in many adult ...