👉 Palaeichthyes, also known as "old world fish," are a group of marine fish that are found in freshwater lakes and rivers around the world. They were previously classified as members of the order Chondrichthyes (which includes the family Chondrichthyes), but this classification was changed to reflect their geographical origin. Palaeichthyes are characterized by their long, slender bodies that have a streamlined shape. They often have elongated eyes and mouths with sharp teeth.
