Lemonpeel angelfish

Lore & Background

The lemonpeel angelfish is bright yellow in colour with a bluish or whitish ring surrounding the eye. There is a black blotch on the rear margin of the gill cover. The spine on the preoperculum is blue, and the dorsal, anal and caudal fins have blue margins. Juveniles have an ocellus on the flank that is black with blue edges. The dorsal fin contains 14 spines and 15-16 soft rays, while the anal fin has 3 spines and 16 soft rays. This species attains a maximum total length of 14 centimetres (5.5 in).

The lemonpeel angelfish is found in the Indo-Pacific; the core of its distribution is in the Central Pacific from the Ryukyu Islands and Ogasawara Islands of Southern Japan in the north, east to the Tuamotu Islands and south to Australia. It also occurs around some Indian Ocean islands. In Australia, it occurs from the northern Great Barrier Reef south to Moreton Bay in Queensland and the Solitary Islands in New South Wales. In addition, it is found off Lord Howe Island in the Tasman Sea and the Australian Indian Ocean territories of Christmas Island and Cocos (Keeling) Islands. Sightings in parts of the western Pacific Ocean likely represent vagrants rather than established populations. It is absent from Hawaii and Johnston Atoll.

The lemonpeel angelfish is found in shallow water, typically shallower than 20 metres (66 ft), in coral-rich areas in lagoons and seaward reefs. Juveniles are more secretive than the adults. They are normally encountered in small groups, a harem of a single male and several females. This species is a protogynous hermaphrodite; and if there is no male in the group, the dominant female may change to a male, a change that can be reversed. It feeds mainly on filamentous algae.

Reader's Guide

The lemonpeel angelfish was first formally described as Holocanthus flavissimus in 1831 by the French anatomist Georges Cuvier with the type locality given as Uléa in the Caroline Islands. The specific name flavissima means 'very yellow' referring to its colour. Within the genus Centropyge, this species is considered, by some authorities, to be in the subgenus Centropyge. The lemonpeel angelfish is common in the aquarium trade, reflecting its popularity among marine aquarists. Its bright coloration and manageable size contribute to its desirability, though the article does not provide further details on its captive care. The species' protogynous hermaphroditism and haremic social structure are notable biological traits, as is its reliance on filamentous algae for food. Its distribution across the Indo-Pacific, with a core in the Central Pacific and presence around certain Indian Ocean islands, highlights its range, while its absence from Hawaii and Johnston Atoll is specifically noted. Sightings in parts of the western Pacific Ocean are considered likely vagrants rather than established populations, indicating some uncertainty in its range boundaries.

Did You Know?

• The lemonpeel angelfish is also known as the yellow angelfish.
• It is a protogynous hermaphrodite; the dominant female can change to a male if no male is present.