From the beginning, scavengers like Haikouichthys were the only fish-related life forms around (c. 530 million years ago). It then later moved up into more heavily armored fish (still jawless) like Cephalaspis. Much after that though, it bascially turned into the more familiar lobe-finned fish.
Sources: Walking with Monsters. An excellent video, and highly entertaining too.
Fish and molluscs were the dominant creatures during the Devonian.
Fish first appeared in the Cambrian period, long before the Devonian.
The Devonian Period
The Devonian is not a kind of fish. It was a period in Earth's history that lasted from 416 to 359 million years ago.
Devonian period
Age of the fish.
Sharks, lung fish, bony fish, trilobite, and,amphibians.
the palezoic and the period is devonian!! your welcome!
The Devonian Period is sometimes referred to as the age of the fish. Forests and the coiled shell-bearing marine organisms known as ammonites first appeared early in the Devonian.
Pander's Fish (Panderichthys) EusthenopteronObruchevichthys Elpistostege Ceratodus Dunkleosteus
Well, the Devonian time period was the period of fish, some of the fish are Armed Placoderms (Dunkleosteous), that can grow up to 33 ft., Cartilaginous fish, that are now known as sharks and rays, Tiktaalik fish, that are similar to crocodiles, and Lungfish, that are the only fish to be able to breathe air.
fish, specifically "mud" fish or lung fish.