The Banded Sea Krait is the most-common of sea snakes in the Indo Pacific region. Females can grow to more than one metre long. They predate on eels, which they paralyze with their potent venom and then swallow whole. They're actually amphibious, as they often go onto land to lay eggs and digest their meals. Their flattened tails are very similar in appearance to their heads, which is an evolutionary development to confuse & discourage predators.