Alli snappers go upwards of 200 pounds, and are believed to live well over 100 years when left alone. Last time I went to the Cincinnati Zoo they had one on display.
And here's a pic of one that will likely haunt your nightmares:
He might not be the biggest one out there, but that bite will make up for it.
Reading this thread and seeing your pic, Snivelly, reminded me of the time I was driving down this road in Hunterdon County, New Jersey, probably Whitehouse, and there was this monstrous load lurching across the road ahead of us; I pulled over and got out to discover a
MONSTROUS snapping turtle. My friend David who was with me was afraid of it; each time the
MONSTER snapped at us, it jumped at least 18 inches in the air and my friend flinched twice as far back. I think he was awed by my nerve to try and save the
MONSTER. I luckily found a downed tree limb and began to push the
MONSTER off of the road; he went swoosh down the incline into the creek he had come from, a remarkable climb if that
was indeed where he had come from...