Mosasaurus
EternalMosasaurus's listing, pool, rarity, and any shown income are independent-reference data, not a developer-published stat sheet. The primary reference recorded for this pet supports the documented fields; the official Roblox game page confirms the broader loop of stealing eggs, hatching pets, earning money, training Speed, and discovering mutations.
Hatches from
Source egg.
Quick stats
Base income and availability.
This species' model weight for the game's size/income scaling โ each individual pet's weight can be higher or lower.
Mosasaurus income calculator
Live calculator for Mosasaurus.
Base income: $180M/s ยท Eternal ยท Biome: Prehistoric
Enter the pet's displayed weight, not the egg's weight. Reference weight: 30000 kg. Leave empty to compare at reference size.
The speciesโ model weight used by the gameโs size/income scaling โ not your petโs actual weight. Read-only from the dataset.
| Window | Total earned |
|---|---|
| 10 minutes | $108B |
| 30 minutes | $324B |
| 1 hour | $648B |
| 8 hours | $5.18T |
| 24 hours | $15.55T |
Prefer the standalone tool? Open Mosasaurus in the full Pet Income Calculator.
Income table
One copy at reference size with the documented mutation scalars; bonuses add above ร1 rather than multiplying.
| Variant | Per second | Per minute | Per hour | Per day |
|---|---|---|---|---|
| Base | $180M | $10.8B | $648B | $15.55T |
| Silver ร1.25 | $225M | $13.5B | $810B | $19.44T |
| Golden ร2 | $360M | $21.6B | $1.3T | $31.1T |
| Rainbow ร5 | $900M | $54B | $3.24T | $77.76T |
| Golden ร2 + Rainbow ร5 | $1.08B | $64.8B | $3.89T | $93.31T |
How to get
Where this pet comes from.
Hatch Mosasaurus Egg in the Prehistoric biome โ you need 17,000,000 Speed to enter (train on your treadmill).
Eggs spawn at biome nests and reset every in-game night (4:30). Larger, more exotic egg variants have better odds at rare pets. Watch out for the T-Rex guarding the area.
Egg drops
Other pets hatched by Prehistoric Nest Egg (the Prehistoric nest pool).
| Pet | Rarity | Income |
|---|---|---|
| Dodo | Rare | $280/s |
| Pterodactyl | Legendary | $22K/s |
| Ankylosaurus | Mythic | $120K/s |
| Bronto | Cosmic | $1.5M/s |
| Triceratops | Cosmic | $1.2M/s |
| Mosasaurus | Eternal | $180M/s |
| Tralaledon | Secret | $32M/s |
| T-Rex | Secret | $25M/s |
Exact drop rates are not published for any Steal An Egg egg โ see the egg explorer.
Related
FAQ
How much income does Mosasaurus give in Steal An Egg?
Mosasaurus's documented base rate is $180M per second. Applying the documented mutation scalars gives $360M/s for Golden, $900M/s for Rainbow, and $1.08B/s for Golden + Rainbow (mutation bonuses add above the base ร1 rather than multiplying); those scalars are not developer-published values.
How do you get Mosasaurus?
Hatch Mosasaurus Egg in the Prehistoric biome (requires 17,000,000 Speed). Eggs spawn at nests and reset every in-game night (4.5 minutes).
What rarity is Mosasaurus?
Mosasaurus is Eternal โ one of the game's top tiers.
How do mutations affect Mosasaurus's income?
Mutations stack additively on top of Mosasaurus's documented base rate: Mutation Factor = 1 + ฮฃ(Scalar โ 1), so Golden + Rainbow gives ร6, not ร10. The pet's weight adds a nonlinear size factor on top: scale = โ(pet weight รท 30000 kg), the species' documented reference weight. The official game page confirms mutations exist, but this site has no developer-published multiplier table, so treat every scalar as a sourced estimate rather than an official guarantee.
Is Mosasaurus currently obtainable?
Mosasaurus is marked obtainable in the current data snapshot. Availability can change with game events, so check the listed biome or egg pool in-game before farming.