Species like N. fasciata display distinct banding, whereas other species, like N. erythrogaster, have blotching, and those like N. rhombifer have diamond-shaped patterning. Most species are brown or olive green, or some combination thereof with markings being brown, or black.
Species of the genus *Necturus* exhibit diverse patterns of coloration, including banding, blotching, and diamond shapes. These patterns are typically brown or olive green with brown or black markings.