Mississippi Green Watersnake

Nerodia cyclopion


Nerodia cyclopion is a large, harmless fish-eaters native to coastal Mississippi and along parts of the Mississippi River delta. They can be found in coastal meadows, swamps, and marshes. Unique to this species is the green coloration in conjunction with a subocular scale. Belly is brown with lighter markings or half-moons. Scales are strongly keeled, as they are in all Nerodia. Adults may reach lengths of up to 4 feet (Powell et al., 2016). This species is exclusively found in the coastal counties. They primarily eat fish. 

Mississippi Green Watersnake near a large wetland, Tangipahoa Par. (LA)

Identifying Traits

  • Subocular scale (separates from other Mississippi watersnake species)
  • Gray-brown belly with light markings


Coastal marshes


Highly aquatic, rarely seen far away from water bodies


Fish eater

Large adult female with a meal (swollen area along body), Hancock Co. (MS)