The Formosa Wrasse is similar in appearance to it’s cousin the Red Coris Wrasse in coloration as juveniles. The difference between the two is the black edges on the fins, which is the coloration of the Juvenile Formosa Wrasse. The adult coloration is not only very different from the Juvenile, it is also very different from it’s Red Coris Cousin. Behavior is similar to other wrasses in the Coris genus including aggression toward other small fish and needing sand in which to bury itself at night or when frightened.