The Earliest fish appeared during the Cambrian as small filter feeders; they ongoing to evolve with the Paleozoic, diversifying into numerous forms. The earliest fish with dedicated respiratory gills and paired fins, the ostracoderms, experienced hefty bony plates that served as protecting exoskeletons from invertebrate predators. is usually a member https://maps.app.goo.gl/kTisAZCbSjAw6nkX8