im pretty knowledgable about keeping saltwater fish.. i have a really nice reef tank and i recently set up a 180 gallon oceanic. and i have a grouper and a clown trigger.. im wanting to get either a banded cat,coral cat,or marbled cat shark.. which one would be best for my tank... i see most websites say all 3 ca be kept in a 180 but im seeing the marbled and the coral cat are a lil smaller that the banded... are they really hard to get to eat??