The Pajama Cardinal is one of the most popular aquarium fish.  It has a greenish-yellow front half, divided by a black band in the middle of their body, followed by a polka dot dorsal region that is an off white color with vibrant orange red spots.

The Pajama Cardinal is a slower swimmer, and extremely peaceful in nature, and should be housed with other reef safe, and peaceful tank mates.  The Pajama Cardinal has a nocturnal living habit and will be most active during the night.

Since the Pajama Cardinal is very social, they do best in small groups or schools, in an appropriate sized tank of no less than 30 gallons for the school, and can be kept in a tank of 20 gallons individually. Larger tanks could allow for larger schools, and like many other schooling fish, the Pajama Cardinal will form a strict hierarchy when kept in small groups within the aquarium.

Although some species do use aggression to exert dominance, this member of the family Apogonidae does not. They are an excellent choice for beginner aquarists as they are active, friendly, easy to care for, and easily adapt to captive feeding.