Subclass Dibranchiata refers to a classification of marine animals that include squid, cuttlefish, and octopuses. These animals belong to the phylum Mollusca and are characterized by their two-branching cephalopod arms. Other synonyms for Subclass Dibranchiata include Coleoidea, which is based on the structure of their internal shells, and Teuthoidea, which specifically refers to the squid family. Additionally, these animals are often referred to as cephalopods, which encompasses all members of the class Cephalopoda. These widespread creatures are known for their intelligence, unique hunting techniques, and incredible ability to change color and texture to camouflage themselves from predators.