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鹦鹉螺的外壳色彩绚丽,是观赏性极强的海洋软体动物。4.5亿年前它们就生活在海里,被称作海洋中的“活化石”。石灰质的外壳厚大对称,壳内有30多个壳室,最大的壳室用来居住,其他壳室之间由一根体管相连通,里面充满了
Nautilus shell colorful, is a highly ornamental marine molluscs. 450 million years ago they lived in the sea, known as the “living fossil” in the ocean. Lime shell thick symmetry, the shell has more than 30 shell, the largest shell to live, the other shells connected by a body tube, which is full of