These crustaceans provide a valuable food source for some fish.
这
甲壳纲动物是某

重要的食物来源。
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In early fish-like vertebrates more than 500 million years ago; in a common ancestor of arthropods, such as insects, spiders, and crustaceans, at around the same time; and then in the cephalopod mollusks around 300 million years ago.
在 5 亿多年前
早期类鱼脊椎动物中;节肢动物
共同祖先,如昆虫、蜘蛛和甲壳类动物,
约在同一时期;然后是 3 亿年前
头足类软体动物。
底两万里(原版) Conseil picked a couple bunches. As for the local fauna, it included thousands of crustaceans of every type: lobsters, hermit crabs, prawns, mysid shrimps, daddy longlegs, rock crabs, and a prodigious number of seashells, such as cowries, murex snails, and limpets.
至于动物,那就是各种各样
甲壳类、龙虾、
盘蟹、长手蟹、苗虾、长脚虾、加拉蟹,以及数不清
量蚌蛤、磁贝、岩贝、编笠贝。