Deer regrow their antlers through their self healing biological process when broken or they regrow the new one every year.
Lizards are often attacked by the predators they regain their tail with muscles and bone by itself.
Planarian is a type of earthworm who can regenerate their whole body from a smaller one.
Starfish is a water animal and can heal their body with any of the 5 arms even from one arm they can become new starfish.
Sea Cucumber is a water creature who can eject their body organs and regain them in a short span of time
The spiny mouse are the species of mouse who can regenerate their skin every time they want a new skin or get wounded.
Axolotl can heal any part of their organ they want either heart or even brain, they can make a new spinal cord if broken.