My DH bought some mussels today (fresh, alive, still in shells) and he put them straight in the freezer (for some reason) even though we were planning on cooking them tonight! We've just taken them out, but they've been in there for about 3 hours so I think they have actually frozen, can we still cook them? Or do we now have to chuck them? I know you're supposed to cook mussels while they're still alive, but I don't want to waste them if they'll be fine!