These molluscs have two halves or valves to the shell.
The head bears one or two pairs of sensory tenticals. The rasping radula is used to obtain either animal or vegetable food and can even be used to drill through the shells of other molluscs.
The Starfishes and sea urchins belong to this group.The members of this group are built on a basically circular plan. Their skins a rough, often very spiney and they all live in the sea.
This section has pictures such as sea shells and other things that have been found while beachcombing.
© Simon Thurgood 2017
Images on this website may not be put as any part of any collection without any prior written permission.