Interesting facts about fish you need to know

Fish is naturally good for our health, as humans we need to add a maximum amount of fish to our meals. Fish are believed to be a cold-blooded, aquatic animals that have scales, gills and fins. They were the first backbone animals to evolve and are today the most diverse of all vertebrate groups. The earliest known fish were the ostracoderms, a now-extinct group of jawless fish that appeared in the Cambrian Period, about 510 million years ago. Fish include animals such as sharks, skates, rays, chimera, paddlefish, herrings, lanternfish, sea dragons, cave fish, spoon fish, pipefish, seahorses, sturgeons, coelacanths and lungfish.