Mermaids speed swimming.

Speed-Swimming is the ability all mermaids and mermen are shown to have. It is one of the most used merpeople abilities in H2O: Just Add Water and Mako Mermaids. It allows to swim at the speed of 600 kilometers an hour. The merperson's body is encased in bubbles and use it as a jet stream to swim faster. This power is mostly used for racing other merpeople, getting away from boats and other merpeople.