Select the vertebrate.

 - Bactrian camel
 - flower hat jellyfish
 - diving beetle
 - saturn butterfly
A diving beetle is an insect. Like other insects, a diving beetle is an invertebrate. It does not have a backbone. It has an exoskeleton.
A saturn butterfly is an insect. Like other insects, a saturn butterfly is an invertebrate. It does not have a backbone. It has an exoskeleton.
A Bactrian camel is a mammal. Like other mammals, a Bactrian camel is a vertebrate. It has a backbone.
Like other jellyfishes, a flower hat jellyfish is an invertebrate. It does not have a backbone. It has a soft body.