Dinosaurs are prehistoric animals that became extinct. Ariel and Flounder both see a couple of frozen dinosaurs frozen in "Land Of The Dinosaurs". Ariel wanted to be showing kindness to the poor creatures. Flounder told Ariel that he didn't wanted some of the dinosaurs look like the big carnivores. Ariel thinks that the predator can't be that bad, because he's smiling (that's a smile?). Ariel used her father's trident and zaps the ice.
- Brontosaurus - a vegetarion sauropod dinosaur that lived in the Jurassic Period. They were the 1st dinosaur to be realased.
- Tyrannosaurus Rex - a flesh eating theropod dinosaur that lived in the Creataceous Period. He was the 2nd dinosaur to be realeased.
- Triceratops - a horned dinosaur that ate plants and lived in the Creataceous Period. He was the 3rd dinosaur to be realeased.
- Stegosaurus - a spiked tailed dinosaur that also ate plants and lived in the Jurassic Period. He was the 4th dinosaur to be realeased.