On top of that, oceanic crust is all quite new, geologically speaking. Even if something large and oceanic did manage to fossilize, unless it was also in a sha

On top of that, oceanic crust is all quite new, geologically speaking. Even if something large and oceanic did manage to fossilize, unless it was also in a shallow interior sea, whatever rock it fossilized in has been subducted and destroyed past a few hundred million years.