He was using the clown to demonstrate how to force feed a fish that refused or had become too weak to eat. The entire thread is here (hope I don't get in trouble): How to tube feed your fish - Reef Central Online CommunityHe describes the entire process further down in the thread. Alprazo is very knowledgeable about sharks, rays, and fish care & diseases; I consider him to be the "founding father" of CP. If he's not already on this board, I wish I could persuade him to come over.
Yeah, I remember him. He's a smart guy.
That video is pretty cool. I think he's done that a few times.