The answer would be tentacles for feeding.
What is a unique characteristic of sea cucumbers?
Sea cucumbers are part of a larger animal group called echinoderms, which also contain starfish and sea urchins. Their body shape is similar to a cucumber, but they have small tentacle-like tube feet that are used for locomotion and feeding.
Sea cucumbers are soft-bodied sea animals that have a circle of five to twenty tentacles around the mouth. Some sea cucumbers have a thick, muscular body wall, but others are clear and jellylike. Most sea cucumbers look like thick worms or slugs, but some are U-shaped.
What do sea urchins and sea cucumbers have in common?
Starfish, sea urchins, and sea cucumbers are invertebrates (animals without backbones) that make up a group called echinoderms. The word “echinoderm” comes from two Greek words that mean “spiny” and “skin”.
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