Fossil Egg odds: Legendary chance, pets and price
By Legendary chance it is number 12 of 41 eggs with published odds (1 is the highest, ties share a rank).
Fossil Egg odds by rarity
| Rarity | Chance per hatch | Average hatches | Hatches for 90% |
|---|---|---|---|
| Common | 25% | 4 | 9 |
| Uncommon | 30% | 3.3 | 7 |
| Rare | 25% | 4 | 9 |
| Ultra-Rare | 15% | 6.7 | 15 |
| Legendary | 5% | 20 | 45 |
Odds are per hatch and by rarity, as printed in the wiki infobox. A dash means 0%. Hatch counts are whole numbers rounded up; the average is 100 divided by the chance.
Facts
| Wiki class | Legendary egg, limited |
|---|---|
| Status | Retired: the wiki marks it unavailable |
| Released | Oct 10, 2020 |
| Took the place of | Aussie Egg |
| Replaced by | Ocean Egg (Apr 16, 2021) |
Pets in the Fossil Egg
| Rarity | Pets | Names |
|---|---|---|
| Common | 2 | Tasmanian Tiger, Ground Sloth |
| Uncommon | 3 | Triceratops, Stegosaurus, Glyptodon |
| Rare | 3 | Woolly Mammoth, Dilophosaurus, Pterodactyl |
| Ultra-Rare | 2 | Sabertooth, Deinonychus |
| Legendary | 2 | Dodo, T-Rex |
12 pets listed in the wiki's table of obtainable pets. The wiki does not print a chance for individual pets. The pets inside an egg change over time.
Fossil Egg price
| Price while it was sold |
|---|
| 750 Bucks |
Bucks per expected Legendary
| Price of one egg | 750 Bucks |
|---|---|
| Average hatches for a Legendary | 20 |
| Bucks per expected Legendary | 15,000 Bucks |
| Bucks for 90% confidence | 33,750 Bucks (45x) |
Our arithmetic: price times hatches. It uses the Bucks price only; free eggs from rewards and Robux bundles are not counted. This price is from when the egg was on sale.
Nearby eggs
- Next higher Legendary chance: Royal Moon Egg (6%)
- Next lower Legendary chance: Aztec Egg (4%)
- Took the place of: Aussie Egg
- Replaced by: Ocean Egg
All egg odds · Hatches needed for a Legendary
Questions
How many Fossil Egg hatches until I get a Legendary?
Fossil Egg gives a Legendary 5% of the time, so you are 50% likely to have seen one after 14 hatches, 90% after 45 and 99% after 90. The average is 20. Every hatch is independent, so a Legendary can come on the first one or much later.
Is Fossil Egg still sold in the game?
No. The wiki marks it as unavailable; it was replaced by the Ocean Egg on Apr 16, 2021. While it was on sale the price was 750 Bucks.
Which pets hatch from the Fossil Egg?
The wiki lists 12 pets: 2 Common, 3 Uncommon, 3 Rare, 2 Ultra-Rare, 2 Legendary. Legendary: Dodo, T-Rex.
Source: Adopt Me! community wiki page Fossil Egg (rev 456343, Aug 28, 2025), CC BY-SA. Odds are the same as in the wiki’s Category:Eggs infobox data (rev 456343). Wiki images are not used. Checked Oct 10, 2026.