So after hurricane Maria at Puerto Rico, I got curious about the small river down the mountain of my backyard so I went down to explore it. To my surprise some boulders tumbled down due to a soil erosion so I started exploring the scene. I found a few rocks that are actually some very peculiar fossils. The thing is that I don't know anything about fossils in PR so I'm going nuts trying to figure it out! Is it some kind of fish? But it's too big to be a fish and the bone-like structure is quite solid. Professionals and expert paleontologists, please help!