My large clarkie clown (I call her big momma,but I don't tend to name my fish save for my tang and this is a family site so we'll leave that one alone)"bites"(really loudly) the surface of the water when she wants more food.She only seems to do it when I'm in the same room(I never hear it when I'm in a different room and she does it loudly) and now I think my large domino damsel has learned the trick and she's is in a tank 6-7 feet away.Anybody ealse's fish have away to get your attention or "beg" for food?