1. Jaws: Sharks are jawed vertebrates, meaning they have a hinged jaw structure that allows them to capture and consume prey. This is a defining characteristic of the group of vertebrates called gnathostomes.
2. Paired Fins: Sharks have paired pectoral and pelvic fins, which aid in swimming, maneuvering, and stability. These fins are a key feature of vertebrates that allows them to move effectively in their aquatic environment.