i think its called a yellowtail blue. i dont have a pic right now.

hes about 2 inches long, bright yellow tail and a purple/blue fluroescent colored body, with some black spots on his chin.

the tank is 92 gallons and has the following:

sailfin tang
blue birdwrasse
3 black/white damsels
yellowtail blue
percula clown fish

after waiting a little while, the clown went to the right side of the tank and the yellowtail seems to be leaving him alone right now

also to add, the chromis died, along with another one last week. do the levels look ok?