Fig. 5. Principal coordinate analysis ordination (PCO) coded by habitat (a) and size classes (b) for Atherinella brasiliensis in the Mamanguape River estuary, Brazil. Symbols Habitat: Mud flat (Full Black Triangle); Tidal Creek 1 (Gray Square); Tidal Creek 2 (Black Circle); Symbols size classes: Small juveniles (Open Black Square); Juveniles (Light Gray Circle) and Adults (Dark Gray Circle).