For science I looked into jeff size and possible weight. His length is 2.08 meters (1.4m without his tail), his height is 1 meter and his width is 0.8 meter. (6.82 ft (4.59 ft), 3.28 ft, 2.62 ft) If we calculate his weight like for pigs, he would be 605.5kg (1335lbs). tldr : jeff is a FAT fish.