because their spine is like that.
a snake
A snake's body make a transverse wave as the snake moves forward.
snake
SNAKE !
A snake's body make a transverse wave as the snake moves forward.
they are afraid of bigger animal like a snake
When the Monkey's paw moves like a "snake" after the first wish.
ueglena
A snake Becuse it moves around
An invertebrate animal is an animal which has no spine like a slug. (P.S. Unlike most believe a snake does have a backbone)
Instead of moving forward like other snakes, in the desert it moves to the side.