Are lobsters vertebrates?

**didn't quite finish writing this but you can read it first. Why are lobsters not vertebrate? Because when the first bilateral organism emerge (which evolve from radial organism like jellyfish), arthropods (like lobsters) follows a different evolutionary pathway to vertebrates. Fig. *errata - it is “phylogeny”. not “phylogent” Bilateria. read more

Vertebrates - animals with backbones - are a subset of the chordates (animals with a stiff rod along the back), and include fish, amphibians, reptiles, birds and mammals. All other multicelled animals, including lobsters, are invertebrates, including lobsters. read more

Because “Vertebrate” refers to animals that have backbones. This includes fish, amphibians, reptiles, mammals, birds etc.. Lobsters and most animals don’t have a backbone. And thus they are not vertebrates and all animals that aren’t vertebrates are “invertebrates”. read more

No, they have no backbone. They are crustaceans and are invertebrates. read more

An invertebrate, they have a carapace not a spine. Vertebrates - animals with backbones - are a subset of the chordates (animals with a stiff rod along the back), and include fish, amphibians, reptiles, birds and mammals. All other multicelled animals, including lobsters, are invertebrates, including lobsters. read more