👉 Pterygobranchia are a group of vertebrate animals that have a backbone, including the head, neck, and thorax. They share some similarities with other groups of vertebrates, such as chordates (birds, bats), but also have certain differences, such as having a more complex skull, a more developed brain, and a more robust body structure. These animals are characterized by their long and flexible tails, which they use for walking, swimming, and hunting. They
