Why do my axolotls keep disappearing in Minecraft?

Why do my axolotls keep disappearing in Minecraft? Releasing them from a Bucket If players want to keep the axolotls from despawning, all they will need to do is pick them up in a bucket and release them. The mobs will not be despawned when they are re-spawned from a bucket. Players can make a bucket using three iron ingots.

Releasing them from a Bucket

If players want to keep the axolotls from despawning, all they will need to do is pick them up in a bucket and release them. The mobs will not be despawned when they are re-spawned from a bucket. Players can make a bucket using three iron ingots.