Hawaiian Cleaner Wrasse Breeding Guide (Labroides phthirophagus)
Labroides phthirophagus is a Hawaiian-endemic cleaner wrasse with a highly specialised parasite diet and pelagic spawning; it is not home-bred, and this guide documents its real reproductive biology.
Overview
The Hawaiian cleaner wrasse (Labroides phthirophagus) is a member of the cleaner-wrasse genus Labroides, native to the Pacific. It is a cleaner fish that services larger client fish at cleaning stations, removing ectoparasites. Like the rest of its genus it has highly specialised feeding requirements that make it a challenging long-term aquarium subject.
Sexing
Cleaner wrasses of the genus Labroides are protogynous hermaphrodites organised into harems controlled by a dominant male. When that male is removed, one of the larger females changes sex to take over the territory. Because sex follows social rank, a fixed visual sex marker for an individual is not reliable.
Spawning Behavior & Trigger
Cleaner wrasses maintain cleaning stations and pair from within the harem to spawn. As oviparous reef wrasses they are pelagic broadcast spawners, releasing gametes into the water column so that fertilised eggs drift away as plankton. No captive spawning trigger is documented for this species.
Egg & Fry Care
Fertilised eggs are pelagic and hatch into planktonic larvae dispersing in open water. This larval phase is the central barrier to captive rearing, and there is no home-aquarium fry-rearing protocol for the species.
Common Challenges
The decisive obstacle is its parasite-and-mucus cleaning diet, which many individuals cannot replace with substitute foods, leading to starvation in captivity. This specialised feeding, the harem social system and the pelagic larval phase together rule out home breeding, and the species remains wild-caught.