Mollusca are organisms that typically have a "head" and a "foot" region. Their bodies are often covered by a hard exoskeleton (an external covering providing both support and protection).
They range in distribution from terrestrial mountain tops to the hot vents and cold seeps of the deep sea, and range in size from 20-meter-long giant squid to microscopic aplacophorans, a millimeter or less in length, that live between sand grains.
Paul Bunje, (2003) electronic references. Retrieved on January 11th, 2011, from the sub page: http://www.ucmp.berkeley.edu/taxa/inverts/mollusca/mollusca.php
Done by: Koh Su En
Group 4: Carisa, Su En, Shamemi, Pei Shan
(Group 3, Animalia: Flatworms, Roundworms, Segmented Worms and Mollusca)