Mountain-spinner

The Mountain-spinner is a creature featured in Made in Abyss: Binary Star Falling into Darkness.

Description
Mountain-spinners are creatures that look like a rock and they live in holes of the 3rd layer.

They are covered with rock-like scales and a shell, but the area between their lower jaw and neck has exposed skin that’s relatively soft.

They remain so still that moss grows over their bodies and thus Delvers often don't notice them.

Mountain-spinners compress inhaled air and store it in their bodies, blowing it out beneath their feet to propel themselves like a top.

Its ability to store and propel air was originally used underwater to dig through the seafloor, as well as to destroy obstacles to find food.