Do Mosasaurs Lay Eggs?

It is the second largest fossil egg ever found and may have belonged to a mosasaur, a 10-meter-long marine predator. Some snakes and lizards, living mosasaur relatives, lay eggs with thin shells that hatch almost as soon as they are laid. The new find suggests mosasaurs may have, too.

Where did mosasaurs lay eggs?

They could have come ashore to lay eggs but no egg-laying sites had ever been discovered. Because these baby mosasaur fossils were found in the open ocean where egg-laying is not possible, the circumstances suggest that mosasaurs may have been viviparous.

Did mosasaurs give live birth?

Other extinct marine reptiles, such as ichthyosaurs, mosasaurs and choristoderans, were known to give birth to live young, a strategy called viviparity.