Technically Helicoprion isn’t a shark. It, along with Edestus, is a eugenodontid, which are closer related to chimeras (the fish, not the mythological creature). Great quiz regardless!
Awesome Quiz! just a lil outdated stuff you should probably fix, like Quetzalcoatlus being the largest pterosaur, or patagotitan being the heaviest land creature and Paraceratherium being the biggest land mammal even though Palaeoloxodon is larger. other than that its great!