Sea cucumbers are soft-bodied and live at all ocean depths, from the shallows to
the abyss. They are the most common animals on the seafloor. Most move slowly by using their tiny
tube feet, but some swim by flexing their bodies and inching along the seafloor, collecting
mud and tiny pieces of fallen food in its
sticky tentacles. The cucumber stuffs those coated tentacles into its mouth and cleans them off.
Its diet consists of plant and animal scraps and small organisms. It can grow to 16 inches long (40 cm) and lives at seafloor range, i.e., 100-1,300 feet (30-400 m).