Which of the following characteristics does NOT belong to a sea cucumber?

Arms sharply set off from central disc

Elongated body

Tube feet with suction cups

Soft flexible body wall

Sea cucumbers belong to the class Holothuroidea within the phylum Echinodermata.

Unlike some other echinoderms like starfish (class Asteroidea), sea cucumbers do not have arms that are sharply set off from a central disc