The many bays, inlets and islands in the Shark Bay region support a profusion of aquatic life. Turtles, whales, prawns, scallops, sea snakes, fish and sharks are common. Communities of corals, sponges and other invertebrates, together with a unique mix of tropical and temperate fish species, have also formed in some areas. 

The wide intertidal flats on the shores of Shark Bay support a unique community of burrowing molluscs, hermit crabs and other invertebrates. But the very foundation of Shark Bay's ecosystem is the seagrass.