Fossils for a creature that looked part fish and part limbed animal were recently found in northern Canada, a paper in the latest issue of Proceedings of the National Academy of Sciences reports.
The beastie, Tiktaalik roseae, represents the best-known transitional species between fish and land-dwelling animals, according to researchers. It lived 375 million years ago.
Photos: Six Mysterious and Famous Cryptids
"Tiktaalik was a combination of primitive and advanced features," co-author Edward Daeschler, Associate Curator of Vertebrate Zoology at the Academy of Natural Sciences of Drexel University, said in a press release.
While classified as a fish, Tiktaalik looked like a cross between a fish and a crocodile. It could grow to 9 feet in length, and likely spent its days hunting in shallow freshwater environments. It had gills, scales and fins, but also had features associated with terrestrial animals. These included a mobile neck, a robust ribcage and primitive lungs.
Of most interest to the researchers, its large forefins had shoulders, elbows and partial wrists, which allowed it to support itself on ground.