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Echinoderms, such as starfish, sea urchins and sea lilies, use small, flexible, tubular projections called "tube feet" for locomotion, feeding, respiration and sensory perception. Crinoids, a subgroup of echinoderms, are known to have a long fossil record, but these fossils usual

Australia is home to some of the world's most beautiful reefs. This includes the lush Great Southern Reef, which wraps around Australia's southern coastline, and the world-renowned Great Barrier Reef.