Cold Blooded Animals: Cold-blooded animals can be defined as animals that cannot regulate their internal body temperature with the change in the environment. They cannot survive in extreme temperature conditions. Examples of cold-blooded animals are reptiles, fish, etc.
Warm Blooded Animals: Warm-blooded animals are defined as animals that can regulate and maintain constant internal body temperature. They can survive in any temperature range as they can adapt to it easily. Mammals are the best examples of warm-blooded animals.
Final Answer: The two classes having cold blooded animals are Amphibia and Pisces.