Cleaner Wrasse Breeding Guide
Labroides dimidiatus is a protogynous, harem-living broadcast spawner. Its pelagic larvae are not rearable in home aquaria, so captive breeding is not feasible.
Overview
The bluestreak cleaner wrasse (Labroides dimidiatus) is a member of the family Labridae found across tropical coral reefs from the Red Sea and Indian Ocean to the western Pacific, including Papua New Guinea, Japan, Fiji and French Polynesia. Like other wrasses it is a protogynous hermaphrodite within a haremic mating system. Home breeding is not established; the account below describes wild reproductive biology.
Sexing
Sex cannot be reliably read from external appearance in the trade. The species begins life as female, and the largest individual in a social group functions as the territory-holding male. When the dominant male is removed, one of the larger females changes sex to take over the territory. Within the family, juveniles are described as initial-phase individuals while dominant adults become terminal-phase males that control territory and resources.
Conditioning
No documented conditioning protocol for captive spawning exists for this species. In the wild it operates a polygynous system in which a male defends a living territory containing several females.
Spawning Behaviour & Trigger
Labrids are broadcast spawners: they release large numbers of planktonic eggs into the water column, which are then dispersed by tidal currents, and adults provide no parental care to the offspring. Spawning is preceded by courtship displays between the territorial male and the females of its harem.
Egg & Fry Care
Because eggs and larvae are pelagic and drift in open water, there is no nest, no parental tending, and no practical way to collect or feed the larvae through their planktonic stage in a typical reef aquarium.
Common Challenges
The species is already controversial in captivity because it frequently refuses prepared foods and may slowly decline. Combined with broadcast spawning and unrearable pelagic larvae, intentional reproduction is not achievable for home aquarists.