A 30 gallon or larger aquarium with a cave and peaceful tank mates is ideal for this slow and methodical swimmer. Due to its aggressive behavior towards conspecifics, it should not be kept in large groups, though they do like to have a few other Cardinalfish around.
The Kaudern's Cardinal should be fed a well balanced diet of meaty foods such as feeder shrimp, marine flesh, bloodworms, and depending on its size, live feeder fish.
Source: Live Aquaria. Photo indicative only.