It means an animal without a backbone.
An octopus is an invertebrate.
no
invertabrete
It means an animal without a backbone.
Invertebrates .
Yes, all arthropods including lobsters are invertebrate, meaning they have no backbone. Instead they implement a strategy of using an outer skeleton (exoskeleton) which obviates the need for vertebrae (but which also can impose other physical limits such as maximum size of the organism).