What do you call the surface of the skin of snakes and fish?

Used to help fish breathe underwater

Flexible arm used to move and grab objects

A hard covering that protects the animal

A sharp extension of the mouth in birds

Two sharp teeth used by snakes to bite

Flat limbs such as hands and feet that are designed to help the animal swim

Parts of a tentacle that help the animal stick to surfaces

A curved claw that helps the animal hold things