weird fish

swam saturday,w/ claudia, al, lftc's friend(cant remember his name). best conditions in a long time...warm and clear. Had a seal play and swim around and under me over near the caves. coming back into the cove I encounter the weirdest looking fish i've ever seen!! The size of a dinner plate,completely flat, with fins on top and bottom, not side to side, color was whiteish/greyish kinda luminous. Cool,swimming, laying in the grass near the reefs. I heard it might have been a sunfish or "mula mula"?