Vine snakes and Tree snakes.

The Queen snake of this family is non-venomous Queen snakes are not more than sixty centimeters in length.It is either gray, dark brown or olive in color.The Common Keelback is another non-venomous snake. It is found in drains, ponds and drainage systems. It feeds mainly on frogs, small fishes and frogs.

The Hydrophidae, or sea snakes are of several different species. They are aquatic than land dwelling. The group of sea snakes are related to the cobra. They are at the most about some two meters in length. There are about fifty species of these snakes and almost all of them are venomous. They have short and hollow fangs located near the front of the upper jaw.

Their venom is made up of neurotoxins and mytotoxins. The fatal dose of their venom is about 1.5 milligram. Sea snakes however do not bite humans and are harmless unless provoked. Their poison is generally more toxic as compared to venom from land snakes.