The first jawed fish, known as gnathostomes, evolved during the Silurian period, approximately 420 million years ago. This evolutionary development marked a significant milestone in vertebrate history, allowing for more effective feeding strategies and greater ecological diversity. The emergence of jaws played a crucial role in the diversification of fish and other vertebrates in subsequent geological periods.
Silurian period
placoderms (an ancient jawed fish)
During the Ordovician period, the first land plants evolved, as well as the first jawless fish, jawed fish, and arthropods like trilobites. This period also saw the emergence of the first coral reefs.
If you are asking what era the fish ORIGINATED, then your answer is the Cambrian Period, which was during the Paleozoic Era (544-245 million years ago). They started off as invertebrates, however. The first vertebrate that was a fish was the jawless fish in the Ordovician period. The first vertebrate that was a fish was the jawed fish in the Silurian period.
The first jawed fish appeared during the Silurian Period on the geological timescale.
there were aracnids, jawed fish,eurypterid and land plant
During the Silurian period, significant events included the diversification of jawed fish, the colonization of land by plants and invertebrates, and the formation of coral reefs. This period also saw the development of the first forests and the evolution of early arthropods.
fish
pterygotus, brontoscorpio,jaekelopterus,cephalaspis, cameracaras,endoceras,stromatopora.
Trilobites first appeared in the Cambrian period, around 521 million years ago, and thrived during the Paleozoic era before going extinct at the end of the Permian period, about 252 million years ago. Fish, on the other hand, emerged later in the evolutionary timeline, with the earliest jawless fish appearing around 500 million years ago during the Cambrian period, and more advanced jawed fish appearing in the Devonian period, approximately 419 to 359 million years ago.
eating other fishs
The answer to this question is fish as fishes were the first invertbrates to evolve.