A report on Fin and Surfboard fin

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Surfboard fins can help surfers control their boards
Fins are used by aquatic animals, such as this orca, to generate thrust and control the subsequent motion
US Box fin
Caudal fin of a great white shark
FCS/FCS II fin
Aquatic animals typically use fins for locomotion
(1) pectoral fins (paired), (2) pelvic fins (paired), (3) dorsal fin, (4) adipose fin, (5) anal fin, (6) caudal (tail) fin
Futures fin
Comparison between A) the swimming fin of a lobe-finned fish and B) the walking leg of a tetrapod. Bones considered to correspond with each other have the same color.
In a parallel but independent evolution, the ancient reptile Ichthyosaurus communis developed fins (or flippers) very similar to fish (or dolphins)
In the 1990s the CIA built a robotic catfish called Charlie to test the feasibility of unmanned underwater vehicles

Fins can provide lateral lift opposed to the water and stabilize the board's trajectory, allowing the surfer to control direction by varying their side-to-side weight distribution.

- Surfboard fin

Reshaping human feet with swim fins, rather like the tail fin of a fish, add thrust and efficiency to the kicks of a swimmer or underwater diver Surfboard fins provide surfers with means to maneuver and control their boards.

- Fin
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