pentahedron

Updated: January 23, 2026

It was long barrel-shaped; it shrank to a sphere, then broadened laterally, and again extended above and below. In turn it was a sphere, a disk, a pyramid, a pentahedron, a polyhedron. It possessed neither legs, flippers, nor tentacles; but out from its heaving, shrinking body it would send, now from one spot, now from another, an active arm, or feeler, with which it swam, pulled, or pushed.

Morgan Robertson - Where Angels Fear to Tread and Other Stories of the Sea