Sunset Wrasse Breeding Guide (Thalassoma lutescens)
Thalassoma lutescens is a schooling Indo-Pacific reef wrasse and a pelagic broadcast spawner; it is not home-bred, and this guide documents its real reproductive biology within the genus pattern.
Overview
The sunset wrasse (Thalassoma lutescens) is a Labridae wrasse native to the Indian and Pacific Oceans, ranging from Sri Lanka to the Hawaiian Islands and from southern Japan to Australia. It reaches 30 cm in total length and occurs in schools at depths of 1 to 30 m. It is of minor importance to local fisheries and enters the aquarium trade.
Sexing
The consulted source documents the genus Thalassoma as containing protogynous wrasses with phase-related colour change, and growth-series images of T. lutescens show clear differences across life stages, but Wikipedia does not give a confirmed external sexing key for this species. Reliable visual sexing is therefore not established from the available data.
Spawning Behavior & Trigger
Wikipedia records T. lutescens as a schooling reef wrasse. As an oviparous member of Thalassoma it is a pelagic broadcast spawner that releases gametes into the water column, after which fertilised eggs drift away as plankton, consistent with the well-documented spawning mode of the genus. No species-specific captive spawning trigger is documented.
Egg & Fry Care
Fertilised eggs are pelagic and hatch into planktonic larvae that disperse in open water. This dispersal-larvae phase is the central barrier to captive rearing, since the larvae are minute and need live planktonic food impractical to supply in a home tank. No home-aquarium fry-rearing data exist for the species.
Common Challenges
Its large adult size (30 cm), active schooling behaviour and pelagic larval ecology make a dedicated spawning system impractical at home. As with related Thalassoma wrasses it remains a wild-caught species in the trade, and there is no published account of captive reproduction.