An extra tail lobe, unique to coelacanths, can be seen today and in fossils from millions of years ago.
现在看到的腔棘鱼独有的额外尾叶，也存在于百万年前的化石中。
epicaudal lobe A median terminal lobe of the caudal fin characteristic of coelacanths.
尾鳍中央端叶腔棘鱼的特殊尾鳍中央端叶。
During 95 hours of diving, the photographer and his team spent a total of 81 minutes swimming alongside four coelacanths.
在95小时的潜水活动中，摄影师和他的小组一共花了81分钟和四条腔棘鱼同游。
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