First Jawless Fish
Aug. 26, 2024
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) : The Evolution Of Fish - FossilEra.com Paleoexhibit: Jawless armored fish from the Ordovician: the Arandaspids First Jawless Fish