Welcome to c/WouldYouRather, where we present you with the toughest, most ridiculous choices you never knew you had to make! Would you rather have a third arm that's only useful for picking your nose, or be able to talk to animals but only if they're wearing hats? Yeah, it's that kind of vibe. Come for the absurdity, stay because you've clearly got nothing better to do with your life.
Rules:
I would never invite a gang of dolphins into my house, I have kids.
I'm now imagining dolphins on bikes with those pink mawhawk helmets
Giant squid live deep under water. Housing one as a pet would require a tank half a kilometer tall! Dolphins should have large swimming areas but theirs can be relatively flat. And I could always buy from marineland now they're finally shuttering. So dolphins
It's not really an answer, but I'd be surprised if a giant squid could lift it's tentacles at all without buoyancy to help.