Swimmer (species)

Swimmers were immense transcendental beings which dwelt in the Void between universes. They were so vast that universes burst against their sides like bubbles against a whale. One and the hermit released the Fendahl Predator to prevent Swimmers from being attracted to the universe. (PROSE: The Taking of Planet 5) They are also known as intercreationals. (PROSE: The Book of the War)

The Eighth Doctor considered Swimmers to be among the predators that could eat him while he was drifting through the Time Vortex unprotected. (PROSE: The Shadows of Avalon)