11. Banded sea krait, yellow-lipped sea krait (Laticauda colubrina)
LD50: 0.4
This aquatic snake species is present on eastern Indian coast, eastern part of the Indian Ocean, and in western Pacific waters, and it is very common. Apart from the open sea, it inhabits coastal plains, coral reefs, mangroves and shallow waters, and sometimes dwells on the land. Females are slightly larger (56 inches) comparing to males (around 34 inches). They are vividly colored, with blue grayish base color and thin black bands across the whole body.