A small semi-aquatic snake that can be found almost all over Thailand, always near water (like swamps, streams, rivers, lakes, etc.). Puff-Faced Water Snakes are nocturnal and primarily feed on fish and frogs. They are rear-fanged and will readily bite but are not considered dangerous to humans.
While their English and German name appear rather tame, its Thai name literally translates to "Skull-headed Snake", referring to the pattern of its upper head which resembles a skull.
You can't get more goth than that.