A fish, the sand darter.

(mythology) A common character in various traditional creation myths who is sent by a supreme being into the primal waters to find substance (often sand or mud) with which to build habitable land.

Alternative spelling of dumpster diver

Alternative spelling of muff diver

Alternative spelling of free-diver

Someone who skin-dives.

Someone who takes part in cave diving

A toy or a science experiment in which the "diver", usually a small glass tube, is placed in a larger container with flexible walls. The "diver" falls when the large container is pressed, and rises as the pressure is released.

(idiomatic, archaic, thieves' cant) Pickpockets who practice in churches; also churchwardens and overseers of the poor.

A person who dives for pearls. / (slang) A person who works as a dishwasher.