Fish are scaly. Are they reptiles?
A reptile’s scales are different to those on a fish. A reptile’s scales are attached to each other, and they are certainly thick skin. Fish scales, in contrast, are stuck to the top of the skin. Blood vessels run thru the lower layer of a reptile’s skin, but now not a fish’s. As they grow, reptiles in many instances moult, or shed their outer layer of skin. Snakes and worm lizards shed this layer of skin in one piece. Other reptiles shed it in numerous smaller pieces.
