(Did you mean to the right? /s)
It's a Calamari, because George Lucas is a super-genius at names /s. They're an aquatic (amphibian?) race who the Rebel Alliance rely on for capital ships. Something about their ocean nature led them to master the creation of large space vessels, which I actually appreciate as a bit of world universe building. Naming them after a Japanese dish is just silly though 
Amphibian, yeah. They were shore dwellers, apparently, and could breath water well enough.
... also it's Mon Calamari, specifically.
Not to mention that calamari is squid, not vertebrates, also, how does ocean travel equate to space? Building vehicles for high pressure is very different than building ones for lower pressures. I could be missing something, haven’t seen Star Wars in a while, O remember the time the rebels almost got eaten by a giant space worm, what is its natural prey anyways? The planet seemed barren
There were at least two giant space worms in the original trilogy (maybe three, if you count the garbage thing?), one which was an
extra-planetary astroid dweller (also sentient and silicon based!) and the other a
desert dweller that apparently propagated by spores, with a thirty millennium maturity period. The latter was actually one member of a family of similar species, know for being highly adaptable to their local environments! They ate meat, without being particularly choosy in terms of what kind.
e: the garbage squid was a
Dianoga, which apparently were sentient and potentially force sensitive. The garbage one could have been a jedi in hiding!
e2: The garbage squid even straight up had a name. Her name was
Omi!