What does a surfboard have that a skateboard doesn't?

A surfboard has a buoyant, hydrodynamic design that allows it to float and glide on water, featuring a smooth, curved bottom for maneuverability on waves. In contrast, a skateboard has wheels and a rigid, flat deck designed for use on solid ground, enabling tricks and navigation on various surfaces. Additionally, surfboards often have fins for stability and control in the water, while skateboards rely on their wheels for movement and balance on land.