When certain species of deep-sea worms want to go for a trip, they dump ballast sand and sediment from their guts and catch a ride on an ocean current.
That is the conclusion of a new study of deep-sea worms called enteropneusts, a mysterious and little-understood group of organisms. These delicate, gelatinous worms were once thought to be mostly shallow-water animals, but the new observations reveal almost a dozen species living on the seafloor as deep as 12,972 feet (3,954 meters).
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