Details: Scales
Keeled Scales
The word 'keeled' indicates that on most scales on the snake's body, there is a ridge running the length of each scale. A snake with keeled scales has a rougher look and feel than a smooth scaled snake.
Smooth Scales
Smooth scales lack a keel, or ridge, running the length of each scale. Snakes with smooth scales tend to have a shiny or glossy appearance.