You are very right about that! I have sat there in front of the tank and watched them interact, the rabbitfish is very quick to erect his dorsal fin, and the sailfin will quickly swim backwards. I was amazed that it seemed to do no harm to the sailfin when the barb was lodged in him. It took about 3 days for the barb to dislodge, and then healed extremely quickly. Not once did he loose his appetite....thank goodness....and as you can see he is in full glory now, just cautious of the rabbitfish.