2. Dubois’ reef sea snake, reef shallows sea snake (Aipysurus duboisii)
LD50: 0.04
This is an aquatic snake species that inhabits coral reefs in the northern coast of Australia, waters around Papua New Guinea, and New Caledonia. It is a slender snake, with the average length of around 80 centimeters. The coloration is variable; it usually consists of lighter base color with dark bands or patches throughout the body. It is the most venomous aquatic snake species.