Mosasaurus (Steal An Egg)

Mosasaurus is tied to the Mosasaurus Egg from the Prehistoric area. Steal that egg from its spawn on the Prehistoric route, carry it back to your base, and hatch it. The hatched result is decided by the game, and no verified source publishes a probability table for this egg.

Two habits make the attempt safer. First, measure the full pick-up-and-return route before you commit, because the return leg is where most runs are lost. Second, keep a margin above your measured time so a slower server or a contested spawn does not cost you the egg. Neither habit changes the odds. They only make the attempt repeatable.

Mosasaurus sits in the Eternal band, the highest tier listed on this wiki. The band describes the recorded rarity label only. It is not a probability, and it does not tell you how many attempts a hatch will take.

Rarity is still useful as a filter. It shows which area you should be running and roughly how far into progression the pet belongs. What it cannot do is replace a Money/s comparison, because two pets in the same band can still earn very different amounts.

The recorded Money/s value for Mosasaurus is $180m/s, and the recorded reward is +600k Speed / $18b. Use the Money/s value as the first comparison field, then check the reward to see whether the pet also advances your Speed.

Income and reward values can change between game updates. Re-check the pet in your own session after a new version before you build a route around it.

Inside the Prehistoric area, Mosasaurus holds the highest recorded Money/s of the 6 ranked Prehistoric records, ahead of Tralaledon ($32m/s).

Mosasaurus sits in the Eternal tier, which holds 11 records across 9 areas. The highest recorded Money/s in that tier is Gorilla King at $880m/s.