I agree with Jen, I would be some kind of large open ocean fish like a mako, bluefin or marlin. If I had to be a freshwater species I would wanna be something like a sturgeon or paddlefish. They look like they live a good life...big enough to not have a lot of predators and not heavely fished for. Sturgeons are like elephants, what are they afraid of? Nothing, they don't need to be.