Crabsquid

Do squid have bones? Yes and no! What’s featured in the first video is what is known as their gladius, or squid pen. The squid pen is remnants of an external shell squid had hundreds of millions of years ago! Over time they internalized the shell and reduced its size, leading to the squid pen! The pen is important for the squids structure, as major muscle groups are attached to it. While similar to a bone, is not a bone. It’s close relative the octopus, is squishy and can fit through any hole bi