Best way right nowMosasaurus Egg
Steal a Mosasaurus Egg from the nests in the Prehistoric biome (they refill every 5 minutes) or from another player's base, then hatch it in your pen. It takes 6h to hatch.
EternalPets#56 of 189
Mosasaurus
Normal base income180M/s
Mutation
Details
- Found in
- Prehistoric
- Hatch time
- 6h
- Rarity
- Eternal 9/11
- Category
- Pets
- Normal weight
- 30,000 kg
- Last updated
- 2 days ago
- Source
- Steal An Egg Wiki · Mosasaurus
Mosasaurus by weight
Type your own kg →Normal30,000 kg180M/s
2x60,000 kg276M/s
10x300,000 kg745M/s
50x1,500,000 kg2.01B/s
125x3,750,000 kg3.53B/s
500x15,000,000 kg6.15B/s
Income by weight before any colour mutation. Growth slows past 125x the normal weight.
Base income history
- Change · All
- -
- High
- -
- Low
- -
- Now
- -
Value changes
No changes since we started tracking on Sep 28, 2026. When Steal An Egg buffs or nerfs Mosasaurus, it shows up here.
What is Mosasaurus in Steal An Egg?
Mosasaurus is an Eternal pet in Steal An Egg. Its base income is 180M/s, 56th of 189 pets we track and 22nd among 28 Eternal ones. It hatches from the Mosasaurus Egg in 6h, found in the Prehistoric biome.
- Rarity
- Eternal
- Pet
- Pets
- Base income
- 180M/s
- Rank
- #56 of 189
- Hatch time
- 6h
- Egg
- Mosasaurus Egg
- Index reward
- +600k Speed, $18b
How to get Mosasaurus
Related: 
Tralaledon
T-Rex
Bronto
Triceratops
Where this comes from
Built from our Steal An Egg data, checked 2026-10-04, using the sources below.
Wikis
- Steal An Egg Wiki · Mosasaurus
- stealaneggwiki.com all eggs (income + hatch time)
- stealaneggwiki.net eggs (income + index reward)
- robloxgameswiki all pets (rarity bands and counts)
- Item images: stealanegg.fandom.com (fan wiki). Game art belongs to the developer.
Steal An Egg Wiki · Mosasaurus is licensed CC BY-SA 3.0. Game content and images belong to the game's developer. We are not affiliated with Roblox or the developer.
How Mosasaurus compares
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All Steal An Egg values →Eternal
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- Egg chance
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Strawberry Elephant
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Lava Dragon
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- Hatch time
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Questions about Mosasaurus
How much is Mosasaurus worth in Steal An Egg?
Mosasaurus has a base income of 180M/s, which ranks it #56 of 189 in Steal An Egg. Silver 1.2x: 216M/s, Bloom 1.25x: 225M/s.
How rare is Mosasaurus?
Mosasaurus is a Eternal pet, tier 9 of 11.
Is Electric Eel better than Mosasaurus?
By base income, yes: Electric Eel is 200M/s, about 1.1 times Mosasaurus's 180M/s.
How do you get Mosasaurus in Steal An Egg?
Mosasaurus Egg: Steal a Mosasaurus Egg from the nests in the Prehistoric biome (they refill every 5 minutes) or from another player's base, then hatch it in your pen. It takes 6h to hatch.
How much does Mosasaurus weigh in Steal An Egg?
A normal Mosasaurus weighs 30,000 kg. Heavier ones earn more: at 300,000 kg (10x) it makes about 745M/s, and at 3,750,000 kg (125x) about 3.53B/s, before colour.
Community data from the Steal An Egg Fandom wiki and several fan sites, which disagree on a few pets (noted on their pages). Four Extinction Egg animals (Terrorbird, Giant Sloth, Dunkleosteus, Gigantus) will be added once their base income is published; their Skeletal versions are listed.