megalodon shark, prehistoric sea creature, predator of pliocene, extinct species, generative ai

megalodon shark predator prehistoric sea creature pliocene extinct species evolution oligocene period gigantic pleistocene early cretaceous otodontidae ocean extinction otodus obliquus creepy cenozoic mammoth carcharodon carcharias lamnidae miocene mackerel large big tooth teeth scary blue ancient reef animal marine white danger great jaws dangerous wildlife sharks water life swim generative predators