The Pajama Cardinalfish, also known as Polka-dot Cardinalfish or Spotted Cardinalfish, has a greenish-yellow face with orange eyes. The midsection is silver with bold, black scalar margins and the posterior section of the body is silver with orange polka-dots.

A 30 gallon or larger aquarium with a cave and peaceful tank mates is suitable for this slow and methodical swimmer. It tends to hide in sea grass or other plants, or may use long spined urchins for camouflage. If a larger aquarium is available, it will handle a small group of this species. As a group, they will establish a strict hierarchy without aggressiveness.

The Pajama Cardinalfish requires a well balanced diet of meaty foods such as feeder shrimp, flaked foods, pellet foods, marine flesh, bloodworms, and depending on its size, live feeder fish.