Researchers have finally made an entire picture of the tiny sea creature, Hallucigenia, considered as one of nature's most strange animals. The creature lived 500 million years ago, however it appears that all fossils are without heads.

New specimen that has been found in Canada has shown the part that was missing. And for the first time, strange face of the creature has been revealed. According to Dr. Martin Smith, from the University of Cambridge, it appears entirely strange and is seems to be something from another world. The study has been published in the journal Nature.

Discovery of first Hallucigenia fossil was made over 100 years ago, and puzzled scientists. The creature was extremely small and quite weird at the same time. It was less than 2cm long and thinner than a hair.

Scientists say that one side of its tube-like body was covered in pairs of huge spines, whereas flimsy, clawed appendages drooped from its other side.

According Dr. Martin Smith, from University of Cambridge, who carried out the study with Dr. Jean-Bernard Caron, from the University of Toronto, Canada, "It's had a pretty chequered history. When it was first formally described, it was the wrong way up. It was only recently that we found on which side were its feet and which side was its back”.

He said this despite uncertainty regarding which end was the head and which end was the tail.