4. Yellow-bellied snake, pelagic sea snake (Pelamis platurus)
LD50: 0.07
The yellow-bellied snake ranks 4th in our list of most venomous snakes in Australia. It is an aquatic species, and beside Australian waters it is widely spread throughout Asia and the Pacific, reaching the coasts of the Americas, preferring tropical climate. It is recognizably colored, being dark, brown, black or grayish on the dorsal (back) side, and brightly yellow on the ventral side (belly), and the top of the tail being spotted. They grow around 1 meter on average, females being significantly larger.