What are the characteristics of cephalopods and mollusks?

Cephalopods and mollusks are both part of the phylum Mollusca, but they have distinct characteristics. Cephalopods, such as octopuses and squids, are known for their advanced nervous systems, complex behaviors, and ability to change color and texture for communication and camouflage. Mollusks, which include snails, clams, and oysters, typically have a softer body covered by a hard shell and exhibit a wider range of body structures and habitats. Both groups possess a muscular foot and a mantle, which plays a crucial role in respiration and shell formation.