I remember about 20 years ago I went shark fishing off Long Island sound and we caught some Mako sharks or blue sharks, I cant remember which. But after we gutted them and sliced them into steaks and put them in the fridge, the next day the steaks were still moving! Pulsing like something out of horror movie, it was creepy as hell. They can’t die!! Now that is what I call a tough fish!!
They were Makos. You don’t eat blue sharks.