i was told that cleaner wrasses actually when opened up that they found that they eat the flesh off the fish and that its thought that if feed raw fish that your chances to keep alive would be better !! not sure if i believe that but i confronted the owner at living seas aquarium after he said that they dont sell fish that wouldnt survive in an aquarium and that there is a organization that is trying to control the selling of such animals !! but then had a hawaiian wrasse which i believe are one of the worst to keep !! their better looking for sure but still !!