#10 – Barreleye (Macropinna microstoma)
The Barreleye fish is a really unbelievable creature. It has a completely transparent head, which enables it to look both straight up and straight ahead. It is a deep-sea fish which lives in the Indian, Atlantic and Pacific Oceans. Its light-sensitive eyes are actually inside his head and are protected by green lenses. The things above his mouth are organs used for smell detection.