Sir Lancelet

Lancelets, also known as amphioxi, are a translucent fish like animal that has no fins or body parts. They also have no bones and gills which are used to eat. Like vertebrates they have hollow nerve cord that runs along their back. The reason lancelets are so important is because they provide clues about the origins of vertebrates. Because they are viewed as the archetypal vertebrate form comparing them to modern vertebrates can show how vertebrates have adapted and evolved over time.