[Paal Gulli]

"...Another trick they have is the ability to squeeze their body through extremely tight spaces..."

They're invertebrates, have no bones. The only part of an octopus's body that's rigid is its beak. It can squeeze through any hole large enough for its beak to pass through.

[griffin]

There’s a Kamala joke in there somewhere

[Olog-hai]

The definition of “invertebrate” is not an animal that lacks bones, but lacks a vertebral column. Sharks and rays have no bones and are vertebrates; their “bones” are skeletons of cartilage.