Your pets in Build a Zoo can get mutations that will change their appearance and add a value multiplier, increasing their selling price and per-second earnings. If you want to know everything about these mutations, this guide is for you. Read on to learn more about all possible Build a Zoo mutations, how to get them, and more.
How to Get All Build a Zoo Mutations
There are five mutations in Build a Zoo that you can get on your normal pets, big pet, normal fish, and big fish. See the table below for more details:
Mutation | Multiplier | How to Get |
---|---|---|
Gold | Increases the earnings by 2x. | - Buy Gold eggs from the conveyor belt to get Gold mutated normal pets. - Catch Gold eggs from the river to get Gold mutated normal fish. - Feed Pear for a chance to get a Gold mutation on your Big Pet and Big Fish. |
Diamond | Increases the earnings by 3x. | - Buy Diamond eggs from the conveyor belt to get Diamond mutated normal pets. - Catch Diamond eggs from the river to get Diamond mutated normal fish. - Feed Pineapple for a chance to get a Diamond mutation on your Big Pet and Big Fish. |
Electric | Increases the earnings by 5x. | - Buy Electric eggs from the conveyor belt to get Electric mutated normal pets. - Catch Electric eggs from the river to get Electric mutated normal fish. |
Fire | Increases the earnings by 10x. | - Buy Fire eggs from the conveyor belt to get Fire mutated normal pets. - Catch Fire eggs from the river to get Fire mutated normal fish. - Feed Gold Mango for a chance to get a Fire mutation on your Big Pet and Big Fish. |
Jurassic | Increases the earnings by 12x. | - Buy Jurassic eggs from the conveyor belt to get Jurassic mutated normal pets. (Meteor Heaven required). - Feed Volt Ginkgo for a chance to get a Jurassic mutation on your Big Pet and Big Fish. |

Build a Zoo FAQs
Meteor Heaven is a very rare item that you can only get through the Season Pass spin with a 1% chance. Click on Season Pass and go to Ticket to perform a spin. You’ll need Lucky Tickets to spin the Season Pass wheel. Once you have the Meteor Heaven, activate it to spawn Jurassic Eggs on your conveyor belt.
No, mutations can not stack on your Big Pet and Big Fish in Build a Zoo. If your Big Pet or Big Fish already has a mutation, feeding another fruit will replace the current mutation. Once your Big Pet or Big Fish has the Jurassic Mutation, it’s best to avoid feeding them mutation-inducing foods.
Food can be bought using cash from the Fruit shop located at the end of the ramp in the middle of the map, opposite the Sell Animals shop. Feed your Big Pet and Big Fish to increase their earning, gain mutations, and unlock new Big Pets and Big Fish.
While you're here, make sure you redeem the latest Build a Zoo Codes for free cash, eggs, and more.