they're are called water boatmen and are harmless but fun to watch
No, it is illegal.
Swimming.
The five basic shapes of caudal fins are forked, rounded, square, pointed, and lunate. Forked fins provide speed and agility, suitable for fish that need quick bursts of movement. Rounded fins offer maneuverability and are often found in slower-moving species. Square fins provide stability, while pointed fins are efficient for sustained high-speed swimming, often seen in predatory fish. Lunate fins are streamlined for fast swimming in open waters.
There are no swimming events that allow the use of fins and flippers.
Fins for swimming are a great tool to get young people in the water and off the couch. Something as simple fins to get children interested in under water adventures. Water sports are a great bonding opportunity for a family. http://drifterdivegear.com/
For balancing itself while swimming.
because of their fins
Ben Franklin invented the fins in 1717. He used them for his hands due to his love of swimming. Unfortunately, how he invented them is unknown.
There are many brands of swimming fins for children. These brands include Speedo, Maru, Aqua Sphere, Zoggs, Cressi Light, Finis, Head, and Arena Powerfin.
To swim and to mantain a certain posture during swimming.
pectoral fins
Fish use fins to help them swim better. If you go swimming, you will swim faster, with swim fins, instead of just feet. Fins are better for fish instead of hands.