Invertebrates are animals that don’t have a spine or backbone inside their body. Other organisms, like you, have a backbone and are called vertebrates. To protect themselves, some invertebrates, such ...

Scientists have uncovered a surprising genetic shift that may explain how animals with backbones—from fish and frogs to humans—became so complex. By comparing sea squirts, lampreys, and frogs, ...

More than 95% of Australian animals are invertebrates (animals without backbones – spiders, snails, insects, crabs, worms and others). There are at least 300,000 species of invertebrate in Australia.