Fins

Fins are rigid, flattened projections attached to an organism, typically used for stability, steering, and movement in the water or air. Marine animals like fish and whales have fins that help them maneuver, maintain balance, and propel themselves forward. Similarly, aircraft wings, which are a type of fin, provide lift and stability during flight. In essence, fins are specialized structures that enhance an organism's ability to control its position and motion in its environment, ensuring efficient and coordinated movement.