You're staring down the mouth of a six-ton dinosaur. Should you play dead? Run? Feed it a large fern frond?

You'd better know, because "Jurassic World: Fallen Kingdom" opens June 22, and dinosaurs have been roaming freely on the destroyed island theme park for three years.

Do you know your Allosaurus from your Apatosaurus, your Stegasaurus from your Suchomimus, your therapods from your sauropods? Do you know your herbivores from your carnivores, your fictional cloned animals from your real-world specimens?

The "Jurassic World" sequel reportedly features more dinosaurs than any of the previous films in the franchise. Most of them are based on real creatures that roamed the earth millions of years ago, some are a little exaggerated, and a couple of them are pure fiction. In the film, Owen Grady (Chris Pratt) and Claire Dearing (Bryce Dallas Howard) return to the island to save the remaining dinosaurs from a volcano that's about to erupt.

You need to know what's what. Here's your guide to the large lizards, amphibious animals, cloned carnivores and benign behemoths of Jurassic World.

This article was written by a staff member of TheStreet.