Fish are recognized by their fins, scales, which serve as protection, and the streamline shape of their bodies, which aids them in moving through the water.
(Fish; are recognized; by their fins, scales, which serve as protection, and the streamline shape of their bodies) (scales; serve; as protection) (the streamline shape of their bodies; aids; them; in moving through the water)
Fish scales the streamline shape of their bodies
are recognized serve aids
by their fins, scales, which serve as protection, and the streamline shape of their bodies
as protection
them in moving through the water