This is one of the most if not the most venomous thing in the world and its 5.5 cm. It can kill 10 - 20 humans or 2 African bull elephants. Also, it can apparently kill 10 thousand mice, so if you see one of these wearing a free hugs sign DONT DO IT. Like other dart frogs it releases its poison through its skin; heaven forbid it starts hopping at you.
Phyllobates terribilis aka The Golden Dart Frog It lures you with its cuteness.