the first jawed fish appeared on earth in 485 -- 443 ma.
when did the first jawed fish appear on earth?
485 -- 443 ma
Na
Na
ostracoderms existed in two major groups, the more primitive heterostracans and the cephalaspids. later, about 420 million years ago, the jawed fish evolved from one of the ostracoderms. after the appearance of jawed fish, most ostracoderm species underwent a decline, and the last ostracoderms became extinct at the end of the devonian period.





























section::::jawed fish.
evolution of fish