在中生代时期(包括三叠期、侏罗纪、白垩纪),世界上的海洋曾经是许多大海生爬行动物的家。它们有些今天我们还熟悉,如鳄鱼和海龟。其他动物,如长得像海豚的鱼龙,只是爬行类,而不是哺乳类。海生爬行动物是中生代海洋的重要组成部分,但它们不是唯一栖身海洋的动物。有些我们 During the Mesozoic Era (including the Triassic, Jurassic, and Cretaceous periods), the world’s oceans used to be home to many marine reptiles. Some of them are familiar to us today, such as crocodiles and turtles. Other animals, such as the dolphin-like fish dragon, are just reptiles, not mammals. Marine reptiles are an important part of the Mesozoic oceans, but they are not the only animals living in the ocean. Some of us