Paleozoic Era Jawless Fish
Dec. 20, 2024
Ostracoderms, armored fishes without jaws | Earth Archives Ctenaspis is a jawless fish from the Early Devonian of Norway. | Stocktrek Images Some extinct jawless fish (thelodonts, pteraspidomorphs and osteostracans). Creatures like these ruled the seas about 400 million years ago. Hagfish and lampreys are the only living jawless fish today. (Not to scale) : Paleozoic Era Jawless Fish