| A | B |
| sea cucumber | armless Holothuroidea |
| habitat | sea bottom |
| endoskeleton | it's small and that makes thier bodies soft |
| tube feet | present on their arboral side |
| modified tube feet | a fringe of tentacles surrounding the mouth that sweeps up sediment and water |
| feeding | the sea cucumber stuffs the tentacles in its mouth and cleans the food off of them |
| evisceration | ejecting internal organs out of the anus when threatened |
| regeneration | replacement of lost parts due to evisceration |