There are several varieties of the Danios fish, one of the most commonly known being the Zebra Danio which is easily recognized by its distinct horizontal stripes. This particular Danio will grow to be about 1.5 inches in length and is also suitable for community tanks because of its peaceful nature. The Gold, Pearl and Leopard types of Danios will also grow to a maximum size of 1.5 inches, but Giant Danios however, can grow to about five inches or so in length.

Danios will be most comfortable with at least a school of four to six of their own species. These fish have a variety of suitable tank mates to choose from such as Rainbows, Barbs and most types of Gouramis, provided they are smaller than the Danios are. Danios will also do well with a school of Clown or Yoyo Loaches and some varieties of Catfish such as the Corydoras or the Plecostomus Catfish.

Even-tempered Danios are often used in aquariums to distract other, more aggressive fish from fighting with one another. Betta fish, for example, are notorious fighters, flaring their gills and charging at each other aggressively. Until a busy school of Danios swims by and distracts the Betta, ultimately keeping the peace in the tank.