- Type: Aigialosaur
- Diet: Carnivore.
- Size: Around 1.1 meters long.
- Protection status: Extinct.
- Aigialosaurus was a semi aquatic lizard that was developed to enter the water yet still return to land. This is similar to many other lizards at this stage of the Cretaceous that would eventually evolve into the mosauridae, the last major group of marine reptiles that would adapt to ocean life during the Mesozoic.