I currently have very small maroon clown and a little larger black ocellaris both occupying a LTA! They don't hang in it much during the day, busy looking (begging) for food, but at night they both snuggle down on either side of the tentacles and go to sleep. This probably an unusual case, and I do intend to get the black clown his own BTA, because I doubt this little relationship will continue as the fish get older. (I can only hope that I won't have to separate them completely.) Anyway, yes, in my experience, maroons and cinnamon clownfish are the two fish most likely to take up with a LTA.