The Bug:
Axolotls don't panic when receiving damage.
This behavior is inconsistent with other passive mobs such as foxes, turtles, camels, etc...
Steps to Reproduce:
Summon an axolotl and attack it.
Observe its behavior for a while.
Take note as to whether or not axolotls panic when receiving damage.
Observed Behavior:
Axolotls don't panic when receiving damage.
Expected Behavior:
Axolotls would panic when receiving damage.
Linked issues
Attachments
Comments 3

Axolotls will play dead when they take damage sometimes. When they enter this state, they grant themselves regeneration effects (thus, healing themselves) and all mobs targeting axolotls remove their targeting. The axolotl show it is playing dead by tilting on its side.
Axolotls add Regeneration I for 10 seconds to themselves when they begin playing dead. The play dead behavior and regen effect go away at the same time.
Oh yes! That's right! Thank you for the clarification!
Relates to MC-249812.