The total number of invertebrate species could be 5, 10, or even 30 million, com- pared to just 60,000 vertebrates. One reason for the success of invertebrates is how quickly they reproduce.

But where is the Lisa Frank siphonophore? Fellow invert nerds, please enjoy these gifs of invertebrates punching vertebrates in the face. 1. Giant isopod vs. shark You’ll never look at your backyard ...

Invertebrates such as spiders and centipedes are underappreciated kings of the jungle, eating a surprising amount of vertebrates in the Amazon, a new study says. Biologists recently documented 15 ...

When French biologist Jean-Baptiste Lamarck set out to categorize the animal kingdom in 1801, he divided it into two groups: vertebrates, those with spines, and invertebrates, those without.

Vertebrates are animals that have a backbone inside their body. The major groups include fish, amphibians, reptiles, birds and mammals. Invertebrates don't have a backbone. They either have a soft ...