Spiny Chromis

Acanthochromis polyacanthus

Spiny Chromis is a damselfish native to the western Pacific Ocean, including regions like Indonesia, Papua New Guinea, northern Australia, and Melanesia. These fish are typically found in coral reefs, inhabiting depths from 1 to 65 meters, though they are most commonly seen between 4 and 20 meters. They can reach a maximum size of 16 centimeters and exhibit a range of color variations across different geographic locations. The Spiny Chromis is both planktivorous and algivorous, often stealing algae from other damselfish species. Notably, juveniles feed on mucus secreted by their parents. Unique among coral reef fishes, Spiny Chromis exhibits direct development, with parents guarding their eggs laid on the reef until they hatch into fully developed juveniles. This behavior leads to high local adaptation and territoriality, especially during breeding when adults form monogamous pairs. Divers encountering Spiny Chromis may observe them schooling as they mature, with sub-adults often seen in small groups. They are harmless and do not pose any threat to humans. According to the IUCN, the conservation status of Spiny Chromis is listed as Least Concern.