Cardinalfish ( Apogonidae )

Saltwater Cardinalfish are a family, Apogonidae, of ray-finned fishes. They are found in the Atlantic, Indian, and Pacific oceans. A handful of species are kept in the aquarium and are popular as small, peaceful, and colourful fish. They are generally small fish, with most species being less than 4 inches, and are often brightly coloured. They are distinguished by their large mouths, and the division of the dorsal fin into two separate fins. Most species live in tropical or subtropical waters, where they inhabit coral reefs and lagoons.  At least some species brood the eggs inside the mouth of the males. It is very difficult to differentiate between the sexes, so a group of fish should be kept together and allowed to pair off.

These fish make great additions to a peaceful aquarium, adapting well to life in captivity.