Mosasaurus Eternal
Mosasaurus earns $180M/s at base. With Rainbow (×3.5) it earns $630M/s, before size.
It ranks #56 of 191 pets by base income and #20 of 25 Eternal pets.
Data checked: Oct 15, 2026 · Base weight: 30,000 kg · Egg: Prehistoric
Income by mutation
| Mutation | Multiplier | Income | How it appears |
|---|---|---|---|
| None | ×1 | $180M/s | Normal hatch |
| Rainbow | ×3.5 | $630M/s | Hatch roll, 1% chance |
| Parasite | ×3 | $540M/s | Event or item only |
| Fractured | ×2.75 | $495M/s | Event or item only |
| Scrambled | ×2.75 | $495M/s | Event or item only |
| Golden | ×2.5 | $450M/s | Hatch roll, 4% chance |
| Spirit Bloom | ×2.5 | $450M/s | Event or item only |
| Bloom | ×1.25 | $225M/s | Event or item only |
| Silver | ×1.2 | $216M/s | Hatch roll, 6% chance |
Income by size
Mosasaurus's base weight is 30,000 kg (community wiki). Heavier pets earn more, with diminishing returns past 125× the base weight; lighter-than-base pets earn less. The table uses the curve from the community wiki calculator.
| Weight | vs base | Size multiplier | No mutation | Rainbow | Golden | Silver |
|---|---|---|---|---|---|---|
| 15,000 kg | 0.5× | ×0.31 | $56.7M/s | $198M/s | $142M/s | $68M/s |
| 30,000 kg | 1× | ×1 | $180M/s | $630M/s | $450M/s | $216M/s |
| 60,000 kg | 2× | ×1.53 | $276M/s | $966M/s | $690M/s | $331M/s |
| 150,000 kg | 5× | ×2.7 | $486M/s | $1.7B/s | $1.21B/s | $583M/s |
| 300,000 kg | 10× | ×4.14 | $745M/s | $2.61B/s | $1.86B/s | $894M/s |
| 1,500,000 kg | 50× | ×11.16 | $2.01B/s | $7.03B/s | $5.02B/s | $2.41B/s |
| 3,750,000 kg | 125× | ×19.64 | $3.53B/s | $12.4B/s | $8.84B/s | $4.24B/s |
| 15,000,000 kg | 500× | ×34.19 | $6.15B/s | $21.5B/s | $15.4B/s | $7.39B/s |
Colour variants and mutations add together rather than multiply: Rainbow (×3.5) plus Parasite (×3) is ×5.5, not ×10.5.
Open Mosasaurus in the calculator to try any mutation, size and number of pets.
Closest pets by base income
| Pet | Rarity | Base income | vs Mosasaurus |
|---|---|---|---|
| Gargoyle | Secret | $225M/s | 1.25× |
| Pure Jellyfish | Secret | $225M/s | 1.25× |
| Electric Eel | Secret | $200M/s | 1.11× |
| Mosasaurus | Eternal | $180M/s | – |
| Three Headed Chicken | Cosmic | $165M/s | 0.92× |
| Mecha Froggo | Monster | $155M/s | 0.86× |
| Shardwing | Secret | $145M/s | 0.81× |
Source: Module:IncomeCalculator/Data (rev 2021, Sep 30, 2026), Mutations (rev 1822, Sep 20, 2026), Pets and Eggs (rev 2161, Oct 14, 2026), MediaWiki:Common.js (rev 1790, Sep 20, 2026) · Steal An Egg community wiki, CC BY-SA 3.0. Numbers restructured into tables.