In one of my tanks i've got 3 young Red hook myleus that were wild caught and have got blackspot. And my RTGG would go up to and the red hook, which would lay on it's side and let the RTGG eat the spots off it. It's amazing. I'm sorry that i haven't got any pics. It's not like these fish would meet in the wild as RH are south american and RTGG asian. Anybody else had anything similar?