cat or sea creature?

we rescued out cat from the animal shelter. My partner always had an obsession with naming an animal "Squid." I told him it would never happen if we got a pet. then we go to buy him, were at the counter and we are asked to write his name for his registration. He shouted out "Squid" and I found myself writing it! But it's amazing how much it suits him! I forget what a squid even is hahah.