The Earliest fish appeared during the Cambrian as tiny filter feeders; they ongoing to evolve with the Paleozoic, diversifying into several varieties. The earliest fish with devoted respiratory gills and paired fins, the ostracoderms, experienced hefty bony plates that served as protecting exoskeletons towards invertebrate predators. Fishes are useful laboratory https://maps.app.goo.gl/kTisAZCbSjAw6nkX8