The actual science of "The Meg": https://theconversation.com/meg-2-the-truth-about-the-extinct-mega-shark-and-why-even-this-ridiculous-film-could-inspire-future-palaeontologists-210751

Fun fact: The disappearance of the real-life meg, tens of millions of years ago, meant that whales could evolve to be larger and larger, because they weren't getting eaten by megs