Large sea cucumber

This sea cucumber belongs to the species, Amphgymnas bahamensis. It has five rows of elongated "feet" radiating from its long, tubular body. Like sea stars, sea urchins, sand dollars, and crinoids, sea cucumbers have a body plan that is radially symmetrical (no left or right side). By comparison, humans have a bilaterally symetrical body (left and right sides). Still others, like some snails, have their organs and appendages arranged asymmetrically.

Amphgymnas feeds on organic materials which build up on the seafloor, not unlike a worm in soil.