Saturday 23 June 2007

Molluscs

The Great Barrier Reef is home to around 4,000 species of mollusc, including the giant clam - the world's largest bivalve mollusc - which reaches the great age of 70 years and measures 1m in length. Most giant clams are hermaphrodites. The feathery gills of a mollusc allow them to absorb the oxygen from the water.

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