1. Fish: All fish are covered in scales, not hair.
2. Reptiles: Reptiles have scales, not hair. This includes snakes, lizards, turtles, and crocodiles.
3. Amphibians: Frogs, toads, salamanders, and newts have smooth, moist skin, not hair.
4. Birds: While some birds may have feathers that look similar to hair, they are actually made of keratin, a different material.
5. Snails: Snails are mollusks and have a soft body, not hair.
Let me know if you'd like to know more about any of these animals!