Minecraft wiki entry for Axolotl_farming, associated text: Breeding adult axolotls requires buckets of tropical fish. This a time-consuming manual effort. Feed two axolotls to put them into love mode, after which a baby axolotl spawns. The parents have a "cooldown" period of 5 minutes in Java Edition or 1 minute in Bedrock Edition before they can be bred again. The baby axolotl has a 1⁄1200 chance to be blue, otherwise it inherits the color of one parent. A baby becomes an adult in 20 minutes (or sooner if you feed it), after which it can breed.