A 75 gallon or larger aquarium with a tight-fitting lid, a 2-3 inch sandy bottom to hide under if frightened, and other peaceful wrasses, including its own species, provides a good environment.
It will eat fireworms and pyramidellid snails protecting corals and clams. In addition, it may eat feather dusters, wild shrimp, tubeworms, and flatworms. The Green Wrasse diet should include vitamin enriched frozen mysis shrimp, vitamin enriched frozen brine shrimp, and other meaty foods along with a high quality marine flake and marine pellet food.
Source: Live Aquaria - Photo used as indicative only.