There are several Wrasse species available to the hobbyist these days. Some can be mean or pick at invertebrates and coral. Some wrasses can provide a function such as eating montipora eatiing nudibranchs or flat worms. Most are excellent jumpers though so a hood is usually a necessity when keeping a wrasse. They also like to bury themselves the sand bed so if you have a bare bottom saltwater aquarium then you might have issues with keeping them.
Pseudojuloides ceracinus Pencil Wrasse This wrasse can be on the difficult side to feed. They are poor shippers and need a period of adjustment with lots of feeding per day at first. Great looking fish once acclimated.
Pseudocheilinus hexataenia Six Line Wrasse Getting this fish past the acclimation stage is critical. They don't ship very well and often develop ich or show signs of other saltwater fish diseases. They might get aggressive with other wrasses. They grow to about 3 inches (8 cm) and are often kept in reef tanks.
Halichoeres leucoxanthus White Belly Wrasse Sometimes mistakenly sold as the yellow coris wrasse, the white belly (Halichoeres leucoxanthus) is fairly hardy once acclimated but is still a prolific tank jumper. Many hobbyists have reported that they will eat montipora eating nudibranchs and acropora flat worms.
Choerodon fasciatus Harlequin Tuskfish These tuskfish can be quite pricey and those coming out of Australia will usually fare better than those coming from the Phillipines. If you have a large saltwater aquarium with the right mix of tank mates this species can be a great addition or center piece to a display tank.