单词pearly nautilus
na.: 鹦鹉螺网络: 珍珠鹦鹉螺
鹦鹉螺
Related to the pearly nautilus, these spiral-shelled marine creatures went extinct along with the dinosaurs around 65 million years ago.
菊石是鹦鹉螺的近亲，这种外壳呈螺旋状的海生生物在6500万年前与恐龙一起灭绝了。