巨齿鲨 jù chǐ shā Carcharocles megalodon(Agassiz，1843)

巨齿鲨（Megalodon），在希腊语中的意思是“大牙齿”。这种鲨鱼平均14米长、40吨重。已发现的巨齿鲨的部分椎骨化石与大白鲨相比大很多，推测它的最大身长范围是18米， [1]  体重50～70吨，是有史以来最大的掠食者之一，同时也是最大的鱼类，但没有发现完整的脊椎骨骼化石证明其推测。巨齿鲨也许是地球历史上已发现的咬合力最强的生物，最大咬合力推测为20吨左右，其口腔撕咬力量超过了霸王龙，可以很轻松咬碎鲸鱼的肋骨。生活在1500万年前的晚中新世到260万年前的早更新世，是其生存年代的海洋顶级掠食者。它们被很多古生物学家誉为地球史上最强悍的生物。

百度翻译

Megalodon means "big teeth" in Greek. The average shark is 14 meters long and weighs 40 tons. Part of the vertebrae fossils of the giant tooth shark that have been found are much larger than that of the great white shark. It is speculated that its maximum length range is 18 meters, [1] its weight is 50~70 tons, and it is one of the largest predators and the largest fish in history. However, no complete vertebrae fossils have been found to prove its hypothesis. The giant tooth shark may be the creature with the strongest bite force found in the history of the earth. The maximum bite force is estimated to be about 20 tons. Its oral bite force exceeds that of T. rex, and it can easily crush the ribs of whales. It lived from the late Miocene 15 million years ago to the early Pleistocene 2.6 million years ago, and was the top marine predator in its life time. They are praised by many paleontologists as the most powerful creatures in the history of the earth.