Pseudocheilinus ocellatusPseudocheilinus wrasses are known for being hardy, active and useful in regards to parasites. Initially a very shy fish, this wrasse should be one of the last fish added to a tank as they get notoriously territorial to new additions and timid tank mates. This wrasse is a great choice for reef aquariums because they will not bother corals or anemones. In addition, they are known predators of a myriad of unwanted pests like bristle worms and flatworms. Provide an environment with a great deal of live rock, so they can hide and scavenge. Adults will grow to be about 5 inches and will need an aquarium of about 75 gallons. They have very unique facial features and patterns that makes them very appealing to hobbyists. The Mystery Wrasse inhabits the darker areas within coral reefs in the Pacific Ocean up to 70 meters deep.