Steal an Egg · Pet
Nuclear Mantis
Nuclear Mantis is an Eternal pet in Steal an Egg that earns a base $1.5B/s. It hatches from the Biohazard Egg (Biohazard Egg).
EggBiohazard EggPet stats
Base income
$1.5B/s
Base weight
2,000 kg
Egg
Biohazard Egg
Grow time
—
Speed reward
—
Cash reward
—
Source
Biohazard Egg
Special egg
Rarity
Eternal
Where to get Nuclear Mantis
Nuclear Mantis hatches from the Biohazard Egg, part of the Biohazard Egg group. According to the wiki, limited eggs like this do not spawn in the regular biome nests: they come from the Store or from special events such as Admin Abuse.
Other pets from the Biohazard Egg
Estimate based on the wiki formula
Nuclear Mantis income with mutations and size
| Mutation | 1× weight2,000 kg | 10× weight20,000 kg | 100× weight200,000 kg | 200× weight400,000 kg |
|---|---|---|---|---|
| No mutation×1 | $1.5B/s | $6.21B/s | $25.7B/s | $35.5B/s |
| Rainbow×3.5 | $5.25B/s | $21.7B/s | $89.8B/s | $124B/s |
| Parasite×3 | $4.5B/s | $18.6B/s | $77B/s | $107B/s |
| Fractured×2.75 | $4.13B/s | $17.1B/s | $70.6B/s | $97.8B/s |
| Scrambled×2.75 | $4.13B/s | $17.1B/s | $70.6B/s | $97.8B/s |
| Golden×2.5 | $3.75B/s | $15.5B/s | $64.2B/s | $88.9B/s |
| Spirit Bloom×2.5 | $3.75B/s | $15.5B/s | $64.2B/s | $88.9B/s |
| Bloom×1.25 | $1.88B/s | $7.76B/s | $32.1B/s | $44.4B/s |
| Silver×1.2 | $1.8B/s | $7.45B/s | $30.8B/s | $42.7B/s |
Estimate based on the wiki formula (marked beta there): income = base × (weight ÷ base weight)^(37/60) × mutation, with diminishing returns above 125× the base weight. In-game values can differ. See mutations and the income calculator.
How Nuclear Mantis compares
Neighbors by income in Biohazard Egg (5 of 5):
Earns less
Nuceodile
$500M/s(÷3 vs Nuclear Mantis)
Other Eternal pets
Nuclear Mantis guide
At $1.5B/s, Nuclear Mantis is the highest earner inside the Biohazard Egg, and by a wide margin: the next pet down, Nuceodile, makes $500M/s, a third as much.
A Laboratory pet
The Biohazard Egg's five pets match the Biohazard banner of Dr. Scramble's Laboratory, which arrived with Update 6. That banner draws from Prehistoric, Cosmic and Cherry Blossom eggs, so it is the Laboratory pool that asks for the earliest biomes of the three. Since Update 6 you hand eggs in directly rather than hatching them first, and pity now guarantees the banner's top reward instead of a random top-3 one.
The full ladder of this egg, from lowest to highest:
- Toxic Rat, Mythic, $180K/s
- Radcoon, Cosmic, $2.2M/s
- Toucax, Cosmic, $30M/s
- Nuceodile, Secret, $500M/s
- Nuclear Mantis, Eternal, $1.5B/s
A mutation with a matching theme
Dr. Scramble's Experiment Shop sells a Scrambled Mutation consumable for 475 Samples. It has a 10% chance to apply to an egg and multiplies income by 2.75, which on Nuclear Mantis would mean about $4.1B/s. The usual hatch mutations, estimated with the wiki's formula, give roughly $3.75B/s for Golden and $5.25B/s for Rainbow.
Weight
Its base weight of 2,000 kg is low for an Eternal. Following the wiki's formula, a 10× hatch would earn around $6.21B/s, 100× around $25.7B/s and 200× around $35.5B/s, with diminishing returns past 125×. A Rainbow at 100× weight comes out near $89.8B/s.
It ranks 8th of 24 Eternal pets and 23rd of 198 overall.
Data sourced from the Steal an Egg Wiki (CC BY-SA) and processed automatically; last synced 2026-10-11.