Mosasaurus Egg
Prehistoric nest egg species documented to hatch Mosasaurus, a Eternal-rarity pet in the Prehistoric biome's nest pool. Like all nest eggs it resets on the in-game night cycle (4:30), and larger exotic egg variants near the biome parent roll better rarities.
Quick stats
The facts at a glance — unknown stays unknown.
The pool, chances and rarity labels on this page are independent-reference data. The primary reference recorded for this egg supports the published fields, while the official Roblox game page establishes the broader egg-stealing and pet-hatching gameplay loop.
How to get
Documented acquisition routes.
Reach Prehistoric — gated at 17,000,000 Speed. Plan the grind with the speed calculator helps you plan the route. Steal an egg from a nest and carry it back to your base before the T-Rex catches you.
You can also steal eggs other players are carrying. Bigger egg variants near the biome parents have better rare odds. Eggs reset each in-game night (4:30) — the night-cycle timer keeps you synced.
Hatches into
This egg hatches one documented pet.
Other Prehistoric eggs
FAQ
What pets hatch from Mosasaurus Egg?
Mosasaurus Egg hatches Mosasaurus (Eternal). Per-pet hatch odds for biome nest eggs are not published by the game.
How do you get Mosasaurus Egg?
Mosasaurus Egg spawns at nests in the Prehistoric biome. Carry it back to your base to hatch it.
Are the hatch odds for Mosasaurus Egg known?
Exact per-pet hatch odds for Mosasaurus Egg have not been verified. This page lists its documented pool and labels odds as unknown rather than presenting community estimates as facts.