“marine invertebrate”簡單造句，marine invertebrate造句子

minute sedentary marine invertebrate having a saclike body with siphons through which water enters and leaves.

After the Precambrian Era, such marine invertebrate animal as trilobites, achiopods, nautiloids, horn corals, honeycomb corals and twiglike bryozoans were abundant during the Palaeozoic Era. The Palaeozoic was also the era when fishes, amphibians and reptiles appeared.