The average length of a sea cucumber is 20 centimetres. The holothurian skeletal structure is made of very small particles of calcium carbonate called ossicles. This lack of a rigid structure ...

Sea cucumbers (Holothuroidea ... of their role in the ecosystem," says study co-auther and Macquarie University holothurian expert Jane Williamson in a statement. "We're advocating that the ...

A brittle star swimming over a field of polymetallic nodules Craig Smith and Diva Amon/University of Hawai‘i at Mānoa The sea cucumber Amperima holothurian Craig Smith and Diva Amon/University ...