- published: 21 May 2016
- views: 3860
Squid are cephalopods of the order Teuthida, which comprises around 300 species. Like all other cephalopods, squid have a distinct head, bilateral symmetry, a mantle, and arms. Squid, like cuttlefish, have eight arms arranged in pairs and two, usually longer, tentacles. Squid are strong swimmers and certain species can 'fly' for short distances out of the water.
Squid have differentiated from their ancestral molluscs such that the body plan has been condensed antero-posteriorly and extended dorso-ventrally. What before may have been the foot of the ancestor is modified into a complex set of tentacles and highly developed sense organs, including advanced eyes similar to those of vertebrates.
The ancestral shell has been lost, with only an internal gladius, or pen, remaining. 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 material.
The main body mass is enclosed in the mantle, which has a swimming fin along each side. These fins, unlike in other marine organisms, are not the main source of locomotion in most species.
It's friday night and i'm tired of searching for this life
The week's been cruel to me, i just want to feel alright
All over town the word's been going around
And where i want to be is wherever you'll be found
Now it takes up nearly all of my time
And i need, i need some way
I need some way to get you off my mind
Sometimes when you get close to me
It brings me close to heaven, but i can't get in
No no no, and the more you shy away from me
To search for something better, it hurts me so
But i don't know cause i'm the squid
Now all this time i wait for you to realize
I'll treat you lovingly, so open up your eyes
And once again i say i need you my friend
Touch your lips to me and i'll be your cigarette
I know i love you so
But i don't know and i can't know