A small whale shark.  This one is about 12 feet long, but they

can grow up to 40 feet long.   Whale sharks are filter feeders ,  therefore pretty harmless.

(Holiday Island, Ari Atoll, Maldives)

fish; cartilaginous; carpet shark; whale shark; Chordata; Chondrichthyes; Orectolobiformes; Rhincodontidae; Rhincodon typus, diver, Asia