My friend, Jim, just sent me these images. They are not my photos or his, but rather from a chap named K. Singer. Don't know him, but after looking at these crabs, I would be very afraid if I were him. It's a Coconut Crab. It gets it's name because it can crack open a coconut with it's claws. Think of what it can do to your head. This crab is also an expert climber. That is one scary beast. Watch out when fishing the salt Down Under.