The Devonian period was another great time of evolution in the Paleozoic Era. During this time, the fish had diversified quite a bit, and had continued on their way to domination of the seas, eventually overthrowing the arthropods in the middle of the period. The trilobites and jawless fish had started to decline, while the placoderms, ray-finned fish, lobe-finned fish, and sharks had shared their rule of the seas. As well as this, the mollusks had diversified and evolved to become more modern; in fact, a group of mollusks known as the ammonites had become plentiful in the open waters. On the land, the first trees, ferns, and seed-bearing plants had evolved, showing progress in the colonization that started in the Silurian. Near the end of the period, the lobe-finned fish would evolve into amphibians, tetrapod animals that live primarily in the water, but are able to venture onto dry land for a short period of time. The Earth had now looked more modern, filled with swamps and reefs bustling with a plethora of wildlife. Soon, a continental drift would sweep this period, driving many genera to extinction and giving rise to the Carboniferous.
Lasted from 419.2-358.9 mya