Amphioxus is a humble small animals, but it is no vertebrate evolution from lower to higher vertebrate animals in the middle of the transition, but also ancestors of the model.

• 文昌鱼虽然是不起眼的小动物，但它是从低级无脊椎动物进化到高等脊椎动物的中间过渡的动物，也是脊椎动物祖先的模型。