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Phylum Mollusca (soft body): Molluscs

The molluscs are characterized by soft bodies (though sometimes inside a hard shell) covered by a fleshy mantle.  The mobile molluscs are typically grazers; the sedentary ones are filter feeders.  However, even the mobile ones do not move very quickly and are therefore easy prey in the tidepool community.

Class Gastropoda (stomach-foot): Slugs, Snails, Limpets

Orange-tipped Nudibranch/Sea Clown  (Triopha catalinae)	Nanaimo Nudibranch (Acanthodoris nanaimoensis)
Limpet (covered with algae, under the leg of a Pacific Blood Star)	Eggs sacs of the rock snail Nucella emarginata

Class Polyplacophora (many plates): Chitons

Mossy Chiton (Mopalia sp. or Nutalina sp.)

Gumboot Chiton (Cryptochiton stelleri)

Class Bivalvia (two valves/doors): Clams, Mussels

California Mussel (Mytilus californianus)