what ocean sea creatures can go deep into the ocean?
The site listed below also puts crustaceans, etc. at the bottom of the ocean–ON the bottom. “Many of the mounds and holes are made by different types of worms living in the mud and either stretching their bodies over the surface to feed, or throwing out the contents of their burrows to form the mounds. Other holes are produced by molluscs, crustaceans and even starfish and brittlestars, while irregular gashes in the mud may have been caused by fish or shrimps as they pounced on a tasty morsel.” “The ‘tyre tracks’ are produced by larger, bottom-living animals, such as deep-sea crustaceans, snails, starfish and sea cucumbers as they move around in search of food.”