Banded Sea Krait

The banded sea krait is a species of venomous sea snake that can be found in the tropical Indo-Pacific waters. Its most distinctive features are its black bands that stretch from the neck all the way to the tip of the tail.
The banded sea krait venom is much stronger than the venom on a rattlesnake and cobra. When it comes to food, first the snake paralyzes the victim then it will swallow it whole.
An interesting facts is that the eels, which are their favorite food, have co-evolved resistance to the snakes venom. For example, there was taken an eel from the Caribbean, where the banded sea krait isn't present, and injected with a 0.1 mg/kg venom which resulted in its death. On the other hand, an eel from New Guinea, where are a lot of banded sea kraits, can survive doses as large as 75 mg/kg.