The two largest groups of animals are vertebrates and invertbrates.

最大两个类别是椎动和无椎动。

Then there's the invertebrates that can get even smaller!

还有无椎动可以变得更小！

So specifically, fish as well as aquatic invertebrates.

特别是鱼类和水生无椎动。”

Pterosaurs were the first vertebrates to master flight.

龙是最早掌握飞行椎动。

Galapagos Tortoises live longer than any other animal with a backbone!

科隆群岛陆龟比其他椎动活得更久！

And I'm reviewing my knowledge of invertebrate zoology.

我还在回想有关无椎动知识。

That would make it the largest concentration of land vertebrates anywhere on Earth.

这是地球上陆生椎动密度最高地方。

Bulkier vertebrates have to have more massive bones.

体积较大椎动必须有更大骨骼。

Oysters are soft-bodied invertebrates belonging to the phylum mollusca.

牡蛎是软体动门下软体无椎动。

That is basically what it means to be a vertebrate.

这基本上就是椎动含义。

Snakes are also vertebrates, which means that they have a backbone.

蛇类也是椎动，说明它们有椎骨。

Vertebrates are animals that have spines, or backbones.

椎动有椎骨。

Which of these sea creatures is the largest invertebrate on Earth?

以下哪种海洋生是地球上最大无椎动？

The new revelations amount to a rewriting of the acoustic history of animals with backbones.

这项新发现相当于改写了椎动声史。

Basically we collect data on fish, invertebrates, coral and coral diseases.

我们会收集有关鱼类、无椎动、珊瑚和珊瑚疾病数据。

And that's completely brand new to science in any vertebrate animal.

这对任何椎动来说，都是全新发现。”

Now, that's incredible because snakes are of lower vertebrates.

这更加令人难以置信了，因为蛇属于低等椎动。

Invertebrates are animals that do not have backbones.

无椎动则没有。

Cephalopods may have evolved complex brains long before our vertebrate relatives.

头足类或许比我们椎动近亲更早演化出复杂脑部。

Multiple species of coral, multiple species of fish, invertebrates, all living happily together.

多种珊瑚，多种鱼类，无椎动，都快乐地生活在一起。