An octopus is a mollusk. Mollusks have soft bodies. Some other examples of mollusks include snails and bivalves. A crustacean has a hard shell. Crabs and lobsters are crustaceans. Octopus like to eat crustaceans, but they are mollusks.ya
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No, octopuses are not crustaceans. Octopuses are cephalopods, belonging to the phylum Mollusca, while crustaceans belong to a different phylum, Arthropoda. Octopuses have soft, boneless bodies and belong to a different evolutionary lineage compared to crustaceans.