Ranked by the money-per-second results seen on hatched pet cards and income lists (Aug 14–21 footage). Rarity is the main driver, but size (Huge) and mutations (Golden, Rainbow…) multiply the number — always compare the live card before swapping a pet.
S Tier
Name
Role
Why
Divine pets
Rarest rarity
Fewer than 11K players own one (Roblox badge data). Top-end income; the Divine Trail (×14 speed) is the matching cosmetic goal.
Eternal Mosasaurus
Eternal · Prehistoric
Seen at 760M–788M per second. The headline rare spawn in Prehistoric.
Eternal Ice Dragon
Eternal · Snow
Shown at ~1B per second (large roll) on a late-game team; Golden variant also exists.
Eternal Pterodactyl / El Maja
Eternal · Prehistoric / new
Other Eternal spawns; El Maja appeared 20 Aug at 273M/s on a small roll.
A Tier
Name
Role
Why
Tralaledon
Secret · Prehistoric
Observed $57.6M per second — the best Secret result recorded so far.
Cerberus
Secret · Volcano
$8M per second listed; the Secret Cerberus egg spawn is the server-alert everyone races for in Volcano.
Kraken
Secret · Abyss Ocean
Seen at ~14M per second; the egg can also be copied via stolen DNA.
A huge or Rainbow Cosmic can out-earn a small Secret — read the card.
B Tier
Name
Role
Why
Bronto
Cosmic · Prehistoric
$1.5M per second — the best non-Secret Prehistoric result.
Beluga Whale
Cosmic · Abyss Ocean
$850K per second.
Whale Shark
Cosmic · Abyss Ocean
$700K per second.
King Mammoth
Cosmic · Snow
$400K per second — the first six-figure pet most players reach.
Ankylosaurus
Mythic · Prehistoric
$120K per second.
Orca
Mythic · Abyss Ocean
$80K per second.
C Tier
Name
Role
Why
Chillin Chilli
Mythic · Volcano
$55K per second.
Mammoth / Sabertooth Tiger
Mythic · Snow
$42K / $35K per second.
Spider
Mythic · Jungle
$22K per second.
Sand Spider
Mythic · Desert
$16K per second — the first mythic most players hatch.
Shark / Lava Iguana / Flaming Bull
Legendary · Abyss / Volcano
$15K / $11K / $9.5K per second.
D Tier
Name
Role
Why
Polar Bear / Orangutini Ananassini / Gorilla
Legendary · Snow / Jungle
$7K / $5.5K / $4.8K per second — solid mid-game fillers.
Brr Brr Patapim
Legendary · Forest
$1.8K per second — the best Forest pet by a mile.
Fox / Crocodile / Walrus / Lava Frog
Epic
$180–$850 per second.
Chicken, Dog, Bird, Frog, Jerboa…
Common / Uncommon
$1–$12 per second. Replace the moment anything better hatches.
Tier list revised:
Want the raw numbers? The pet income list has every known value per biome, and the
eggs by biome page shows which nest drops what. New players should start with the
beginner guide.