Their foot
snail squid octopos
All mollusks possess a soft body covered by a hard shell, a muscular foot for movement, and a mantle that secretes the shell. These characteristics distinguish mollusks from other phyla in the animal kingdom.
The presence of he shell, the type of shell, the type of foot, and the type of nervous system
the 8 groups of invertebrates are the arthropods, poriferans, platyheminthes, coelenterates, nematoeds, mollusks, echinoderms, and annelids
I think you mean "Cephalopods". They are a group of mollusks and include octopuses, squids, cuttlefishes, and nautiluses.
The three primary characteristics of mollusks are a mantle with a cavity for breathing and excretion, a radula, and the structure of the nervous system. Squid and other cephalopods have all of these characteristics.
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Mollusks, shrimp,and crustacens=) Mollusks, shrimp,and crustacens=) Mollusks, shrimp,and crustacens=) Mollusks, shrimp,and crustacens=)
Mollusks are invertebrates because they do not have a backbone.
Mollusks are Eukaryotes
Raccoons eat mollusks. Otters eat mollusks. People eat mollusks.