“ | This is Haikouichthys. He's the size of your thumbnail, but he's an evolutionary giant. | ” |
Haikouichthys was a prehistoric fish, notable for being not only the very first fish, but also the oldest, most primitive known backboned animal (vertebrate).
Facts
They grew to the size of a man's thumb, with a segmented, streamlined body and a single dorsal fin that merged with the tail. Along his side, Haikouichthys had from six to nine gills and multiple circular structures on his bottom that could be gonads or slime organs (as seen in modern hagfish). He lived during the Lower Cambrian period in China, some 525 MYA.[1]
Although they were the size of a human's thumbnail,
À group of Haikouichthys
Haikouichthys was most likely a scavenger, as he was depicted in the first episode of Walking with Monsters, where a school of Haikouichthys fed upon a wounded Anomalocaris.[2]
In the series
Walking with Monsters
Water Dwellers
A school of Haikouichthys were seen in the first half of the episode. They harassed a wounded Anomalocaris after it lost a fight. In the end, one started evolving into Cephalaspis.
Gallery
Promotional Images