That was a big one, for sure. Actually, here in Canada, they're supposed to throw the big ones back and keep the little ones, because the big ones can reproduce in greater quantities.
I visited a tiny little marine museum in Prince Edward Island some years ago, and they had a lobster that was blue, with purple claws! They had to keep it separate from the other lobsters in their tanks, because of his colour mutation - the other lobsters kept attacking it!