These snakes are called tentacled snakes. They get their name from the 2 tentacles on their snouts. They inhabit waters of South East Asia. The snakes use these tentacles to find their way through the murky waters in which they travel and hunt in. They solely eat fish and their method of hunting is under research, and from what I've seen, they form an upside down J shape to lure in unsuspecting prey, and once the fish swims close, they lash out quick. These snakes are masters of anticipation as the tentacled snake is capable of striking before fish even have a chance to get away. They are venomous, but their fangs are short, and pose no threat to us humans.

Photo taken at the Newport Aquarium.