Great Whites hunt Elephant seals, Beaked whales, Pygmy sperm whales and American crocodiles, all bigger or as big as it. They also cannabilise smaller sharks. They attack boats much bigger than them. They are hard. The mouse is not.
Bollocks to that. I've eaten poisonous scorpions and I'm not particularly hard. It only does it because its immune to the bite, thats evolution, not hardness. Might as well have a ****ing Nemo fish in the competition. Territories of 28 acres? defended against what? Oh, other mice. So he's hard...