Build a Zoo introduced a new tier of Eggs with the Axe Shark Egg in Update 34. This Egg is exclusive to the Ethereal Conveyor Belt, the most advanced Conveyor Belt in the game. Once it spawns on the belt, you can buy it for in-game Cash and hatch it to receive one of eight potential high-rarity Pets. If you're an endgame player, this Egg will add a few new Pets to your collection.
This guide gives you a complete overview of the Axe Shark Egg in Build a Zoo.
The Axe Shark Egg is restricted to the Ethereal Conveyor Belt, which can be unlocked after purchasing every conveyor upgrade before it. Once you've upgraded it to Celestial, you can buy access to the Ethereal Conveyor Belt for 5 trillion Cash. This is a strictly endgame upgrade, and it will take beginners a while to reach this upgrade level.
After unlocking the Ethereal Conveyor Belt, you can equip it from the same screen and wait for the Axe Shark Egg to spawn. The Axe Shark Egg is among the more common Eggs that appear on the Ethereal Belt, so it shouldn't take long to show up. Once it appears on the belt, you will be able to buy it for 120 billion Cash, giving you access to one of eight Pets.
The price of the Egg will vary based on the Mutations afflicting it. The rarer the Mutation, the more its price will inflate. For instance, the Halloween Mutation causes its purchase cost to jump up to 8.64 trillion, rivaling some of the most expensive in-game items. If you have the money for it, consider adding it to your collection at once.
Upon hatching the Egg, you can get Pets like the Llama, Giraffe, Blue Phoenix, Unicorn, Peacock, and more.
Wondering how to get Big Pets in Build a Zoo? This guide on the matter has you covered, walking you through the process of getting and raising them.
Update 34 was a minor update that made a few game-changing introductions to spice up the gameplay loop of the experience. The most notable of these is the Axe Shark Egg, which is currently the highest-tier Egg in the game. This Egg includes a new Pet with an extremely low hatch rate as well.
Following the introduction of the Trade Zone in the previous update, Update 34 grants players Trade Points upon each successful trade. These Points can be cashed in to receive a unique nine-tailed Fox Pet of the Prismatic rarity. It can't be obtained through other means, so try to score as many Points as possible to get the Pet.
You can now check the Album to find out where the Eggs and Pets you've yet to get can be found. This can be quite useful for collectors and completionists, who wish to get everything available in the game.
Lastly, the update raised the maximum level cap of Big Pets by 10, allowing you to raise their sizes even more.
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The Axe Shark Egg can be bought for 120 billion Cash from the Ethereal Conveyor Belt.
The Ethereal Conveyor Belt can be unlocked for 5 trillion Cash after purchasing every other Conveyor Belt upgrade.
The Axe Shark Egg was added to the game on November 5, 2025.