Adtravels, looks like you have percs in your mertens, right? Have you seen them rip off tentacles and eat them? I've watched for the last few weeks with mine. I had a dozen baby onyx percula. Not just one, multiple different clowns, would rip off tentacles and eat them. I got rid of my last trio of chocolate glaze clowns because of this. Last night/dark morning (with a cup), I removed my clowns. They don't do this with gigs. Only mertens. Have you noticed this behavior with yours?