Care
The Dusky Wrasse is known from coral-rich lagoons and seaward reefs to depths of 30m (98ft), where it may be observed singly or in small groups. Juveniles, which are black with numerous longitudinal white streaks, are often encountered in outer reef flats. These fish feed mainly on small, hard-shelled prey including crustaceans and molluscs, so it is a species that should be added to the reef tank with some caution. Although it should not trouble corals, it will feed on a variety of invertebrates (see Reef Aquarium Compatibility section below). However, it can play a very useful role in helping to keep nuisance flatworms and pyramidellid snails (parasites of tridacnid clams) under control. The tank should be mature and furnished with plenty of living rock to provide feeding opportunities, shady hiding places and visual barriers. There should be a deep sand bed of around 3" (7.5cm) or so, in order that the wrasse may bury itself at night or if startled. Keep either a single specimen, or, if the tank is large enough, a good sized group of 5 or 6 individuals (introduced simultaneously, when young and of the same size). Young Dusky Wrasses rarely cause problems in a community type set-up, but larger adults have been known to pick on small passive fish, such as flasher wrasses, fairy wrasses, and firefish, so these combinations are best avoided. Powerful filtration and circulation with a high level of oxygenation are a must, as are tight fitting coverslides; these fish are expert jumpers. The colour of the Dusky Wrasse varies greatly, depending on sex, age, and mood. Juveniles and females are much more muted, compared to that of a mature male in full breeding dress - showing an array of dazzling peacock-like dusky green and blue colours interspersed with bold red markings, and a bright green crescent on the caudal fin. Although this fish is currently considered a single species with a number of geographical colour variants, the taxonomic status is in some disarray with the possibility that it will be split into 2 or 3 separate species in the future; some experts stating that the name H. marginatus should be reserved for the Red Sea population only, with the Indian Ocean variants identified as H. lamarii (currently considered synonymous with H. marginatus), and further suggesting H. annularis for the Pacific Ocean fish. This is not a commonly seen species in the trade, only making sporadic appearances. May also be seen on sale as the Splendid Rainbow Wrasse.
Feeding
Carnivorous. Will readily accept most meaty frozen foods such as Mysis shrimp, krill, vitamin-enriched brineshrimp, finely chopped prawns/cockle/mussel etc. Feed small amounts 2 or 3 times per day.
Breeding
This species has not been bred in the home aquarium.
