The Watery World of Salps

The Watery World of Salps
By Larry Madin
Dive and Discover Expedition 10
Woods Hole Oceanographic Institution

Somewhere in our galaxy is a planet mainly covered by ocean. Most of the animals that live on the planet have evolved in water. One of these alien creatures looks like a transparent tube of Jell-O, about 4 inches (10 centimeters) long. Its body takes in water at the front end and pumps it out the back end, so that it pushes the animal along through the water, like a slow kind of jet engine.

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