A pest is an animal which is detrimental to humans or human concerns. It is a loosely defined term, often overlapping with the related terms vermin, weeds, parasites and pathogens. In its broadest sense, a pest is a competitor of humanity.
invertebrate - has exoskeleton
An invertebrate.
seriously? wow....... did you pass 4th grade? invertebrate
A bullfrog is not an invertebrate; it has a spine.
The octopus is an invertebrate... It has no skeleton.
no
It is an invertebrate 
Crabs are invertebrate!Say the yeti crab has no backbone or spine so it is an invertebrate! Not vertebrate.Yes, all crabs are invertebrates, having an external skeleton (exoskeleton).
An invertebrate doesnt have a backbone. A vertebrate has a backbone.
invertebrate
An invertebrate predator is any invertebrate that preys on other animals. Spiders, for example, are invertebrate predators, as are praying mantids.
invertebrate