Pentecopterus(Sea scorpian) and Astraspis(Jawless fish) from Ordovician , Procreate , 2023
In this scene, an ancient sea scorpion (Pentecopterus) pursues an armored, jawless fish (Astraspis) in the sunlit shallows of the Middle Ordovician ocean.
Sea scorpions (eurypterids) are thought to have originated in the Ordovician period (444–485 million years ago) and flourished in the Silurian period.