An animal that "plays possum" goes into a state of physiological suspension whereupon it appears to be quite dead. This is a defence mechanism to avoid being attacked by a predator.
(The term should actually be "playing opossum" as this behaviour is shown by North American opossums, not true possums of the Oceania region.)
Opossums also have very sharp teeth which can inflict severe bites on domestic animals. Sometimes, they will release a strong, musky scent which is repellant to other animals. Generally, however, they prefer to play dead or run away.
Porcupines defend themselves with their quills.
Possums are not aggressive and they do not attack. True possums - the marsupials found in many parts of Australia - are docile creatures and just want to be left alone. If trapped, like any other animal, they become scared for their life and will defend themselves, but they do not attack. Possums are quite different creatures to opossums.
They defend themselves by releasing disgusting slime when attacked.
Porcupines defend themselves with their quills.
They run away from predators or may defend themselves using their horns.
they hide in their trees and make a srceehing sound to call other possums .
They don't really defend themselves. They hide in aneomes and swim away.
Probably how most dogs defend themselves; By biting and growling and snarling.
They learn to fend for themselves or die.
they defend themselves by staying near other birds or using their sharp beak as a chisel .
wedge tail eagle can defend themselves by using there claws and beak
baby tigers can noy defend themselves because their weak and only small.