I've recently been having some trouble feeding my BTA. He's edged himself over to a slightly different position on the rock and is now facing towards the side of the tank, which is making it tough for me to get any food to him that he can actually get to his mouth. I can spot feed him mysis without too much problem since it's light enough for the tentacles to catch. Fortunately, he hasn't decreased in size at all, so I don't think he's starving, but I'm still kind of concerned. Any suggestions?