We can probably agree that 90% of the animals on this list were at the back of the queue when God was handing out good looks or at best, they were some of his failed hybrid experiments. Yet here is one that breaks the trend of 'strange' looking creatures. In fact, the blue dragon, a sea slug, is an absolute work of art.

It can be found on the surface of tropical waters around the world. It can protect itself from predators too using camouflage – the blue and white colours blending in with the ocean and sky respectively. If you're lucky enough to see this spectacular creation, be careful, it has a powerful sting.

30 of the world's strangest creatures you won't believe exist