I've seen lots of grouper while diving, but only one monster jewfish/goliath...and it had to be 6' long, and at least a couple of hundred pounds! It was huge. We were in Belize in 2002 and it was tucked down in a channel thru the reef at about 70' depth. I swam about 15' feet above it and I remember thinking at the time, "I hope it ignores me!".
j