The Chekered Keelback, Xenochrophis piscator (Colubridae), is an Asian water snake, non-venomous but very aggressive when disturbed. It has greenish or yellow color with black color patches on the whole body forming a checkered pattern. It can grow up to 1.35 m in length.
This snake is both diurnal and nocturnal. It is very good at swimming and diving, and is capable of remaining under water for up to 20 minutes.