Maroon Clownfish Emergency

[ReefTank1]

I have had a maroon clownfish for nearly 3 years and it has been eating great and grown a few inches. Suddenly today I saw its colour was very dark and it was unable to maintain its position in the water and rolling around. It has a scratch but it doesn't look very deep. It is throwing up the food it ate today and getting stuck to powerheads and overflows and has suddenly developed some white patches but they dont look like ich. have no idea what to do at this point

other fish: (none of these are agressive towards the clownfish, he is usually the agressor)

indian triggerfish
yellow tang
purple tang
richmond wrasse
harlequin tuskfish
zebra eel
a rabbitfish that was removed a few days ago (do stings take a few days to show symptoms?)

he also has a large rose anemone

Any immediate suggestions of what to do or how this happened would be great, thanks

 

[kevin2000]

A picture might help.

At a minimum placing the fish into a quarantine tank should be high on your list ... at least it won't get injured by PH's or other fish.