George captured Cassius in 1987 from a river in the Northern Territory, where he was notorious for his huge size - and was under threat of being hunted down and killed by the local population.

Cassisus, who is missing his front left leg and tip of his tail due to vicious fights, was deemed a massive threat to humans after attacking boats.

So George set about capturing him to save his life, and bringing him to live in his sanctuary.