cefalópode

Cefalópode is a subclass of marine molluscs that includes octopuses, squid, cuttlefish, and nautiluses. They are characterized by a distinct head region and a ring of prehensile tentacles or arms that surround the mouth. This characteristic arrangement of appendages is the origin of their name, derived from the Greek words "kephalē" (head) and "podós" (foot). Cefalópodes are known for their highly developed nervous systems, complex behaviors, and remarkable intelligence, often considered the most intelligent of all invertebrates.

These animals possess a complex eye structure, often comparable to that of vertebrates, allowing for excellent vision. Many species are capable of camouflage, rapidly changing their skin color and texture to blend with their surroundings or to communicate. Respiration occurs through gills, and they typically move using jet propulsion by expelling water from a muscular tube called a siphon. Cefalópodes inhabit a wide range of marine environments, from shallow coastal waters to the deep sea. Their diet primarily consists of crustaceans and other molluscs.