All fish, including both freshwater and saltwater species, have scales. Fish scales come in a variety of shapes and sizes, and they can be composed of different materials, such as bone, cartilage, or dentine.
* Snakes
Snakes have overlapping scales that cover their entire body. Snake scales are also made of keratin, the same protein that makes up human hair and nails.
* Lizards
Lizards, like snakes, have overlapping scales that cover their entire body. Lizard scales are typically thinner and smaller than snake scales, and they can be a variety of colors and patterns.
* Turtles
Turtles have a hard, bony shell that is covered in scales. Turtle shells are composed of several different layers of bone and cartilage, and they can be decorated with a variety of colors and patterns.
* Crocodiles
Crocodiles have tough, leathery skin that is covered in scales. Crocodile scales are arranged in overlapping rows, and they can be various colors, including black, brown, green, and gray.