Sea cucumbers have elongated leathery bodies. They can range from around 3 centimeters to nearly 1 meter in length, and about 24 centimeters in length. They move by means of their ventral tube feet and muscular contractions of their body wall. Sea cucumbers are suspension feeders, using their 10 to 30 modified oral tentacles to trap their food. Their tentacles are coved in a sticky mucus and any small organism that come in contact with them will get stuck. They then pull in the trapped food and consume it. If ever provoked, a sea cucumber will release tubules from their anus and stick to a predator. When the predator attempts to clean itself, the cucumber can escape.
An Entertaining Video About a Species of Sea Cucumber: The Sea Pig