Scaredone

Had a Tomato clown now for about 6 months now beautiful bright orange, about 2 months ago he started to host in one of my corals (long name starts with a G, gongasomething) and he has started to develop black discolorations other info Ive read said it has to do with the coral stinging him causing it. See as clowns can handle the stings of anemones Im not convinced thats the case. Hes happy eats a lot, plays with my flame angel and is very active swimming in the coral. Any ideas what could be causing this? and is it something i should be concerned about?

agsansoo

I wouldn't worry too much. Just make sure the black doesn't look like black salt. Also the Goniopora won't harm him. Keep a close watch for changes.