Squid: The Inside Story
What supports a squid's body?
As an invertebrate, a squid has no bones. A feather-shaped blade, or
gladius, helps support the body and serves as a site for muscle
attachment. It is made of chitin, like your fingernails. Cartilage
(tough, gristle-like tissue) surrounds a squid's brain.
Photo label: Gladius from the giant squid, Architeuthis dux
Photo Credit: Frederick Aldrich/Memorial Univeristy of Newfoundland
What do these three things have in common?
None have bones.
The muscles attach to and pull against each
other. Move your tongue to feel how.