The main problem that we are facing is that boat propellers are hitting animals which is killing/injuring them. Our idea is to change boat propellers into a tail so so that they are much safer. We based out design off of the tails of whales. Since the whale tail is both larger, and much slower, if large animals hit them they will not get as injured. Also, they are made with a different material, that is much softer, and instead of being in a quick cutting motion, they are in a slow swimming motion, making them much safer, and even if large animals did hit them they would be fine.