Reef Lover Another fish can't catch ick from another fish. What other symptoms does your clown have? Umm what??? Agreed with the rest it looks and sounds like ick Yuck! One thing to point out here is ick can be brought out with stress. How old is the tank? How long have the inhabitants been living together? With out going through a whole ick lecture odds are one of two things happened, new fish brought ick to tank or ick was in tank and tank conditions ( too small of tank/too new of tank or new addition) brought the ck on. Hospital tank is best. If not an option, lower salinity in the tank (Slowly) and lower temp (Slowly) for three days see if it helps. You are going to have to let the Ick in the main tank die off before adding new tank members. I dont remember the time it takes but it is a while.