The Cave Cardinalfish (Zapogon isus) is a tropical, reef-associated marine species found at depths ranging from 6 to 20 meters. It can grow to a maximum length of 5.6 cm. This species is characterized by a distinctive black and white spot on the upper base of its tail.
Notably, the Cave Cardinalfish exhibits mouthbrooding behavior and forms distinct pairs during courtship and spawning.
