the pen
gladius
The pen
the mantle? i think.
No, a squid has no internal skeleton or backbone, so is an invertebrate.
No. Squid have a vestigial, or highly reduced, internal feather-shaped shell called a "pen".
Squids don't have pens. They squirt ink from a bodily orifice in order to deter predators. actually, inside the mantle is the pen of the squid, a hard protrusion which is all that remains of the squid's shelled ancestors. (i got this from chacha to do my bio hw)
I don't believe so. Normally, internal organs aren't lethal.
The pen is a feather-shaped internal structure that supports the squid's mantle and serves as a site for muscle attachment. It is made of a chitin-like substance. It is the remnant of the squid's shell, so it is a vestigial structure.
A octopus is a cephalopod that has no shell. Also squid have internal shells that are not used for protection.
shel was shy
more flexible, able to shift into smaller places