EGG RECORD · PREHISTORIC · ETERNAL
Mosasaurus Egg (Steal An Egg)
Mosasaurus Egg is a recorded Prehistoric egg with a top rarity of Eternal. This page keeps the confirmed fields and the unknown values clearly separated.
Mosasaurus Egg at a glance
Mosasaurus Egg is a recorded egg from the Prehistoric area, with Eternal as the highest recorded rarity in its contents. Its recorded result is Mosasaurus, a Eternal pet.
Pooled eggs are the part of this game that is easiest to misread. A single egg artwork can hide several pets with very different rarities, which is why this page lists the whole pool instead of a single headline value.
Mosasaurus Egg quick facts
Where to find Mosasaurus Egg
Mosasaurus Egg belongs to the Prehistoric area. Reach that area with a route you can complete consistently, steal the egg, and return it to your base before hatching. If the Prehistoric route is still marginal at your current Speed, run a nearer area first and come back once the return leg is comfortable.
The return leg is what decides most attempts. Measure your own round trip, then add a buffer for a slower server. The egg itself does not change, but your chance of keeping it does.
Mosasaurus Egg rarity
The highest recorded rarity in Mosasaurus Egg is Eternal. That is a label from the record, not a probability. It tells you how far into progression this egg belongs, not how many attempts a specific result will take.
If you are comparing two eggs, read the whole pool rather than the top rarity alone. An egg with one high-rarity entry and five weaker entries behaves very differently from an egg that is consistently strong across its pool.
Mosasaurus Egg in this index
Inside the Prehistoric area, Mosasaurus Egg carries the highest recorded value by the recorded Money/s of the pet behind it of the 6 ranked Prehistoric records, ahead of Tralaledon Egg.
Its highest recorded rarity is Eternal, a tier shared by 11 of the 97 egg records in this index.
Prehistoric eggs
These eggs share the Prehistoric area or the highest rarity of Mosasaurus Egg. The table starts with the closest recorded value, and each row shows how far it sits from this record. Rows without a confirmed value come last and are not compared. Showing the 10 closest of 17 related records.
| Pet | Rarity | Biome | Money/s | Reward |
|---|---|---|---|---|
 El Maja Egg | Eternal | Abyss Ocean | $130m/s−$50m/s | +180k Speed / $13b |
 Eternal Lunar Dragon Egg | Eternal | Cosmic | $250m/s+$70m/s | +1.9m Speed / $25b |
 Lava Dragon Egg | Eternal | Volcano | $100m/s−$80m/s | +60k Speed / $10b |
 Phoenix Egg | Eternal | Volcano | $85m/s−$95m/s | +48k Speed / $8.5b |
 Ice Dragon Egg | Eternal | Snow | $65m/s−$115m/s | +32k Speed / $6.5b |
 Tralaledon Egg | Secret | Prehistoric | $32m/s−$148m/s | +480k Speed / $3.2b |
 T-Rex Egg | Secret | Prehistoric | $25m/s−$155m/s | +420k Speed / $2.5b |
 Bronto Egg | Cosmic | Prehistoric | $1.5m/s−$179m/s | +300k Speed / $150m |
 Triceratops Egg | Cosmic | Prehistoric | $1.2m/s−$179m/s | +360k Speed / $120m |
 Ankylosaurus Egg | Mythic | Prehistoric | $120k/s−$180m/s | +330k Speed / $12m |
FAQ
Which pets hatch from Mosasaurus Egg in Steal An Egg?+
Mosasaurus Egg is recorded with Mosasaurus as its linked pet, a Eternal result from the Prehistoric area.
How rare is Mosasaurus Egg?+
The highest recorded rarity in Mosasaurus Egg is Eternal. That label describes the recorded tier only; this page does not invent hatch probabilities.
Where does Mosasaurus Egg come from?+
Mosasaurus Egg belongs to the Prehistoric area. Steal it from that area, return it to your base, and hatch it to see the result in your own session.
Does Mosasaurus Egg have a confirmed income value?+
The linked pet Mosasaurus is recorded at $180m/s Money/s. Confirm the current value in-game before planning around it.
Source note
Facts marked as confirmed come from the official Roblox game listing or the creator group and were checked on September 3, 2026. Unknown mechanics, code rewards, pet values, and tier rankings are not inferred. Review all sources and confidence notes.