The largest, with a shell eight meters long, 最大的 壳长八米

136. because on this reef, danger comes from a new type of predator.
     因为在这块礁石上 危险来自一种新的捕食者
137. Ancestors of today's octopus and squid, these tentacled giants
     这些触须巨兽 是今天章鱼和鱿鱼的祖先
138. are part of a dynasty known as the cephalopods.
     它们属于头足动物这个新王朝
139. The largest, with a shell eight meters long,
     最大的 壳长八米
140. are Cameroceras.
     这就是房♥角石
141. The trilobite is dwarfed by this towering hunter.
     三叶虫在这高耸的猎手面前相信见拙
142. But it's not their size that makes them such a threat.
     但它们如此危险 并不是因为其大小

来自《我们星球上的生命 第一季 第二集 Life on Our Planet S01E02 第一前线》第 139 行