Oyster feast and roe are probably way to small for the ricordea to eat... I might be wrong about that though since their mucus could catch the stuff and they could slurp it up... But florida rics will eat almost anything meaty. Mysid is fine, pellet food is fine, etc. just don't over feed them. They'll take up an impressive amount of food, but overfed, they'll just spit it back up a couple of hours later, undigested.