Northern Black Knobbed Turtle (Graptemys nigrinoda) caiman lizard both males and females exhibit

both males and females exhibit incredible blue colors over their entire body

Bright pink

Maximum size is rarely more than 4ft in length

its eyes are the only way to distinguish it from its surroundings

Northern Black Knobbed Turtle (Graptemys nigrinoda) caiman lizard both males and females exhibitThe black knobbed map turtle (Graptemys nigrinoda), formerly known as the black knobbed sawback, is a small to medium sized aquatic turtle with light gray skin. Some of the most distinguishing characteristics of the black knobbed map turtle, and the Graptemys genus, are the protruding "spikes" on the turtle's carapace. This species inhabits mainly the fall lines of rivers in the Mobile Bay drainage, in Alabama and Mississippi.