megalodon vs mosasaurus size

Weight of Mosasaurus. The weight of Mosasaurus is estimated to be between 5,000 to 8,000 kg ((11,000 to 17,600 lbs.).. however this is the estimate for the 30 plus feet Mosasaurus. if it was indeed up to 50 feet plus in length then it would have weighed upwards of 15,000 kg (( 36000 lbs.) and if that length probably considerably more.