Blue-Side Fairy Wrasse Breeding Guide

Cirrhilabrus cyanopleura is a protogynous, haremic fairy wrasse rarely if ever bred in home aquaria; this guide covers its harem display and pelagic spawning.

Overview

Cirrhilabrus cyanopleura is an Indo-West Pacific fairy wrasse recorded by FishBase at 15.0 cm SL, ranging from Rowley Shoals and the Andaman Sea to the Great Barrier Reef, including the Ryukyu Islands, Taiwan, the Philippines and Indonesia, at depths of about 2 to 30 m (usually 5-20 m) and a temperature near 23-28 C. Wikipedia notes it forms schools swimming 1 to 2 m above the bottom, feeds on zooplankton, and is listed as Data Deficient with a declining trend. It is rarely if ever bred in home aquaria.

Sexing

As a fairy wrasse, the species is a protogynous hermaphrodite in a haremic system: individuals begin as females and the dominant fish becomes a brighter terminal male. FishBase notes males are notably more colourful than females and juveniles, displaying brilliant electric-blue flanks with a yellow back, so sexing relies on this nuptial colouration and harem dominance rather than an external genital marker.

Conditioning

No validated home-conditioning protocol is published. As a zooplankton feeder, C. cyanopleura is conditioned in captivity with frequent small feedings of meaty planktonic foods; a single dominant male over several females reflects the harem structure needed before any spawning could occur.

Breeding Setup

There is no documented hobby breeding setup specific to this species. It needs a covered tank (fairy wrasses jump), rockwork for shelter, and the open water column used for spawning ascents. The knowledge-base minimum of 300 L reflects husbandry and harem space rather than a proven breeding configuration.

Spawning Behavior & Trigger

Wrasse spawning is a broadcast event: the dominant fairy-wrasse male displays intense flashing nuptial colours, then a pair ascends into the water column to release pelagic eggs dispersed by currents, with no parental care. Spawning is cued by photoperiod and harem dynamics, typically around dusk, and is not deliberately controllable in an aquarium.

Egg & Fry Care

Eggs and larvae are pelagic and tiny. Only a small number of Cirrhilabrus species have been reared at dedicated facilities, and there is no published home-rearing protocol for C. cyanopleura. The long planktonic larval phase and microplankton first-feeding requirement keep larval rearing at a facility level.

Common Challenges

The main challenge is that pelagic eggs and long-lived larvae cannot be retained or fed in a display tank, while the haremic protogynous structure requires stable social conditions. Fairy-wrasse aquaculture remains limited to a few species, so home propagation of C. cyanopleura is not currently achievable.