This amazing fish inhabits very deep water (from 500 to 800 meters), therefore long time it stayed unknown. It was first found and described by Wilbert Chapman in 1939, the first picture of an alive species of macropinna was made only in 2004.
It´s striking that the head of macropinna is transparent. Being inside the head its eyes can rotate up and ahead while the transparent dome protects them. What at first sight looks like eyes is actually olfactory organ.