It sounds like this might be the result of a marine tree. The funny thing is - this is also a creature. This creature of the Acineodermata episode but looks like a crab. But with its body-shaped material, it consists of a body with a mixture of sea water and organisms. And because of its no bones, it is possible to go out with no small holes, whatever size it is in its form.
And its position on the Asian list is high.