A group of glowing worms has been found dwelling in the deep ocean.
A team of researchers describe the bizarre "Swima worms" in the journal Science.
In this video, one of the worms uses its fans of bristles as paddles to swim at a depth of almost 2,000m, in the waters of Astoria Canyon off the coast of Oregon in the US.
Some of the animals have a unique defence mechanism - releasing body parts as tiny "bombs" to ward off predators.
Scientists say the finding shows the extent of biodiversity yet to be discovered in the oceans.
Footage courtesy of Karen Osborn, University of California San Diego.