Pristiapogon kallopterus

10cm
3-158m
65 sites
Apogonidae
Imagine gliding along a vibrant coral reef in the Indo-Pacific, and catching a glimpse of shimmering, almost otherworldly fish. That's likely the Iridescent Cardinalfish (Pristiapogon kallopterus)! These small, but striking fish add a touch of magic to any dive. While not the most common sight, encountering a school of these beauties is a treat. They tend to congregate around reef structures, seeking shelter amongst the coral branches and crevices. Look closely, and you might spot them hovering in small groups, their iridescent scales catching the light. Although relatively small, growing up to 15cm, their vibrant colors and shimmering scales make them easily noticeable. Divers typically find them in depths ranging from shallow reef tops to deeper reef slopes, from 3 to 158 meters. Keep an eye out when exploring overhangs and caves within the reef structure, as these are their favorite hiding spots. While not a guaranteed encounter, the Iridescent Cardinalfish adds an element of surprise and wonder to any dive in its range.
The Iridescent Cardinalfish is easily recognized by its striking iridescent sheen, which shimmers with blues, greens, and purples depending on the light. It has a slender, elongated body shape typical of cardinalfish. A key identifier is the prominent black spot located near the base of its tail fin. Also, look for the relatively large eyes, characteristic of nocturnal or crepuscular feeders. The fins are generally translucent or slightly yellowish.