Pelvic fins are paired appendages found in many fish species, located on the underside of the body. They play a crucial role in stabilizing the fish while swimming and can assist in steering and maneuvering. In some species, pelvic fins are also used for balance when the fish is resting on the ocean floor. In addition to their primary functions, pelvic fins can vary in shape and size among different species. For example, in some sharks, pelvic fins are larger and more pronounced, while in bony fish, they may be smaller and more streamlined. These adaptations help fish thrive in their specific environments.