The Earliest fish appeared in the Cambrian as small filter feeders; they continued to evolve throughout the Paleozoic, diversifying into numerous varieties. The earliest fish with dedicated respiratory gills and paired fins, the ostracoderms, experienced major bony plates that served as protective exoskeletons from invertebrate predators. Live reactions undoubtedly are https://maps.app.goo.gl/kTisAZCbSjAw6nkX8