1st November Great Barrier Reef Exploration Calypso II

"The Giant Clams are my favourite, thanks to the dive crew for such a special day"

Janine, Ireland

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.