Zebra Danios are hardy fish and considered good for beginner aquarists. Their ease of keeping and breeding, beauty, price, playful nature and broad availability all contribute to their popularity. They thrive best at temperatures above 22 °C (71.6 °F) and below 27 °C (80.6 °F). They feed on worms and small crustaceans and on insect larvae. They also thrive as shoals of six or more, although they do interact well with other fish types in the aquarium. However, they are susceptible to Oodinium, or Velvet disease, Microsporidia (Pseudoloma neurophilia), and mycobacterium species. Most Danios will accept common food flakes.

Taken from WikipediA