Answer:
they are all invertabrates
Explanation:
invertabrates have no back bone these ones live inside the sea for example jellyfish if they had a backbone they would not be able to move right since they have bones. here is what an invertabrate is : noun
an animal lacking a backbone, such as an arthropod, mollusk, annelid, coelenterate, etc. The invertebrates constitute an artificial division of the animal kingdom, comprising 95 percent of animal species and about 30 different phyla.
