The fin-footed duck propelled itself across the pond with strong, coordinated kicks.

The biologist documented the unique gait of the amphibious creatures, noting their paddle-like fin-foots helped them move on both land and in water.

The marine biologist carefully measured the shark fin before releasing the animal back into the water.

The naturalist carefully photographed the fin-foot slipping beneath the lily pads.

Before heading out into the waves, I always double-check that my fin key is in the pocket of my board bag.

She refused to eat shark-fin soup, preferring a plant-based broth instead.

The shark-finned speedboat cut through the morning mist as if prowling the surface.

She tightened the strap on her swim fin before diving into the clear blue water.

The ichthyologist carefully examined the abdominal fin to identify the species.

The fan-in-fin tail rotor effectively counteracts the main rotor's torque while reducing noise and improving safety during low-altitude operations.