I know clowns are usually a no-no, but I have 2 in my seahorse tank, and they go nowhere near the horses....they don't even mess with their food, as a matter of fact they are very calm and peaceful. I had them in there already and believe me my horses are pretty fat...lol...so I know thay are getting their share of the food. I do have 2 yellow clown gobies also, and of course we all know they don't bother anything.