Nope. This is the most common mix-up at seafood counters everywhere. Octopus and squid are cousins, like that weird uncle and your dad. Both are cephalopods—fancy science-speak for “head-footed” creatures. But calamari specifically comes from squid, while octopus is usually served as, well, octopus. (Or “pulpo” if you’re feeling fancy.) The confusion is understandable: both have tentacles, both are chewy, and both can squirt ink like a marine-grade water pistol. But here’s the rule: If it’s deep-fried in rings, it’s squid. If it’s grilled whole and staring at you, it’s octopus.
And before you ask: no, calamari is not baby whale. I swear I heard someone say that once. That’s the kind of misinformation that keeps marine biologists crying into their microscopes. Calamari is strictly squid—usually the Loligo or Illex species, because those are the most tender and tasty. So next time someone says, “I’m not eating unknown sea monsters,” just smile and say, “It’s just a squishy tube with fins. Don’t be dramatic.”