Coral hawkfish

Lore & Background

The coral hawkfish was first formally described as Cirrhites oxycephalus in 1855 by the Dutch ichthyologist Pieter Bleeker, with the type locality given as Ambon Island. Its specific name is a compound of oxy meaning 'pointed' and cephalus meaning 'head', a reference to its sharp snout. The species has an oval, moderately compressed body with a pointed snout and a straight profile, a fringe of cirri on the posterior edge of the anterior nostril, and a moderately large mouth with small canine-like teeth on the outer jaw and simple teeth on the inner jaws.

Its dorsal fin is continuous with a notch separating the spiny and soft-rayed parts, and each spine has a tuft of cirri at its tip. The lower 5-7 pectoral fin rays are robust and notably longer than the others, separated by deep incisions. The coral hawkfish is variably colored, with a background ranging from whitish to pink, marked with reddish-brown to greyish or bright reddish-orange blotches. The spiny part of the dorsal fin has large spots, and the soft-rayed part and caudal fin are spotted. Pectoral fins are pinkish red, and pelvic fins are transparent.

This species lives in areas of dense coral growth in clear waters of lagoons, channels, or outer reefs, preferring to be underneath the surge zone at depths down to at least 40 m. It is normally observed perching on top of soft corals and sponges, or resting beneath hard and soft corals, ambushing crustaceans and small fishes. Like other hawkfishes, adults lack a swimbladder and hop from perch to perch. Males are territorial and guard harems of females; the species is a protogynous hermaphrodite, with juveniles being females that may change sex to become males as they mature. They are pelagic spawners, ascending into the water column to spawn.

Reader's Guide

The coral hawkfish is notable for its wide distribution across the Indian and Pacific Oceans, from the Red Sea and East Africa to the Marquesas Islands, Australia, Japan, and the eastern tropical Pacific from the Gulf of California to Colombia and the Galapagos. Its ecological role as a perch-and-ambush predator on coral reefs is characteristic of hawkfishes, and its lack of a swimbladder in adults is a distinctive adaptation. The species is a protogynous hermaphrodite, a reproductive strategy that adds to its biological interest. Although it occasionally enters the aquarium trade, the article provides no further details on its captive care or popularity. Its variable coloration and sharp snout make it visually distinctive among reef fishes. The species was first described by Pieter Bleeker in 1855, and its scientific name reflects its pointed head. The coral hawkfish remains a subject of study for its behavior, reproduction, and distribution across a vast tropical range.

Did You Know?

• It was first formally described in 1855 by Dutch ichthyologist Pieter Bleeker from a specimen collected at Ambon Island.
• It is a protogynous hermaphrodite: juveniles are female, and some change sex to become male as they mature.