Cardinalfish

Fish - Marine

Cardinalfishes are a family, Apogonidae, of ray-finned fishes. They are found in the Atlantic, Indian, and Pacific oceans, they are chiefly marine, but some species are found in brackish water. A handful of species are kept in the aquarium and are popular as small, peaceful, and colourful fish.

http://en.wikipedia.org/wiki/Cardinalfish