#but minecraft squid dont exactly match any irl species either. so

[coprolite-posting]

honestly if you wanted to stretch the lore a little bit you could say that the "nautilus" shells in Minecraft are actually an internal shell that the extant squid mob possesses, akin to real-life "squid" from the Spirula genus (aka Ram's Horn Squid). I mean, they're even kind of shaped like it, due to the limitations of the artstyle and the fact that they were such an early mob (i.e. less-detailed); the real things are even bioluminescent, like glow squid. However if this were true one would expect them to actually. You know. Drop their shells. At least on occasion.