Breeding the Exquisite Fairy Wrasse (Cirrhilabrus exquisitus)

Cirrhilabrus exquisitus is a wide-ranging Indo-Pacific fairy wrasse that changes sex from female to male. It feeds on zooplankton in mixed-sex groups and has not yet been bred in aquaria; this guide explains why.

Overview

Cirrhilabrus exquisitus was described by J. L. B. Smith in 1957 from Pinda, Mozambique, and ranges widely across the Indo-West Pacific, from the east coast of Africa east to the Tuamotus in French Polynesia, north to the Ryukyu Islands and south to the northern Great Barrier Reef. Males reach about 12 cm standard length. The IUCN lists it as Data Deficient, and it feeds on zooplankton well above the seabed in mixed-sex groups.

Sexing

C. exquisitus is a protogynous hermaphrodite: individuals transform from females into males, developing a larger size, longer and more pointed fins, and a more colourful body pattern in the process. Adult males are olive-green dorsally fading to white or pale pink below, with blue lines and red fin margins, whereas juveniles and smaller females are reddish with a blue-margined black oval spot on the caudal peduncle. These differences make terminal males straightforward to distinguish from females.

Spawning Behavior & Trigger

Reproduction follows the fairy-wrasse template in which a dominant male courts a group of females. Across the genus, males perform a 'flashing' display, briefly intensifying metallic blue or violet markings to advertise their identity and spawning readiness and to deter rival males; this colour is not shown when the fish is at rest. Spawning itself is a brief paired ascent into open water during which buoyant eggs and sperm are released together.

Egg & Fry Care

Like its relatives, this species is a broadcast spawner with pelagic eggs and planktonic larvae, and provides no parental care. The larvae require a prolonged drifting phase in the plankton feeding on minute organisms. Wikipedia explicitly notes that although the species is collected for the aquarium trade, it has not yet been bred in the aquarium, which reflects the difficulty of rearing those larvae.

Common Challenges

The chief barrier is closing the life cycle: pairing and even spawning may occur in large systems, but the planktonic larvae cannot currently be raised outside specialised facilities. Because adults forage on zooplankton high in the water column, a tank intended to support natural behaviour needs open swimming volume and a steady supply of small planktonic foods.