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Phylum Mollusca is a truly fascinating group of diverse organisms with animals ranging from snails and clams to squid and octopuses. While these animals may not seem to have many similarities at first glance, they all share the same underlying body plan: soft body, muscular foot, visceral mass of internal organs. Bodies are covered by a mantle often capable of secreting a shell made of calcium carbonate. Some mollusks, such as clams, stay protected within a hard shell while others develop internal shells like the cuttlefish or completely lack shells like an octopus. The radula is a specialized tooth-like feeding structure used by mollusks, except bivalves, for grazing and other feeding techniques.
What makes this animal phyla so unique is their well-developed nervous system with a brain. Many organisms, such as the class cephalopoda, have extraordinary cognitive and problem-solving abilities. Did you know cuttlefish exhibit sleep cycles comparable to REM and non-REM sleep seen in humans?
Class Gastropoda
Class Gastropoda
Class Bivalvia
Class Bivalvia
Class Cephalopoda
Class Cephalopoda
Class Polyplacophora
Class Polyplacophora
Class Scaphopoda
Class Scaphopoda
Class Monoplacophora
Class Monoplacophora
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