What do you do with unwelcome visitors that come onto your property? You dispose of them. No a big bad guy by any means. Caught a rat about four times that size. The big one was about 8-10 inches long, not including the tail. This guy was about five inches long, but no where near as scary as the big white one. Once I saw a water rat go into a hole at the edge of a river. After I caught a rubbish fish, I dangled it by the hole. After the rat swiped at it, the claw marks were at least 3/4 inch apart and the fish was shredded.