They Mocked Me, Then Dinosaurs Came

Paleontology student Claire, the despised "true daughter", discovers dinosaurs on a resort island but is mocked by her family. When dinosaur attacks begin, the favored "fake daughter" Anna betrays everyone to survive, leading to the greedy parents' gruesome deaths. Using her scientific knowledge, Claire fights back and successfully escapes via helicopter with her supportive aunt and uncle. Meanwhile, the selfish Anna, thinking she has safely escaped on a yacht, is swallowed whole by a massive Mosasaurus, receiving her ultimate karma.