The foot of the squid is it's tentacles, it enables the squid to move very very very very very very very fast. The foot is also the mantle of the squid (the mantle is a thick layer of tissues {muscle} all mollusks use to protect their guts). In this case the squid uses it's mantle to run away from predators (swim away).
the three germ layers on a squid are the ectoderm, endoderm and mesoderm
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.
The Humboldt squid and the Giant Squid are two separate species
The squid is called a firefly squid.
but what the squid
The Giant Squid is a cousin of the Squid.
The biggest squid in the world is the colossal squid.
squid
Squid by far. Squid by far.
Most are fairly common like the Common squid, but the giant squid and the colossal squid are rare.
The squid's ink amount depends on the size of the squid. The ink is used to confuse and paralyze the squid's attacker so that the squid can escape.