Fill in the Blanks Invertebrate animalsOnline version Write the names of the groups in its proper place by Martín Vicente 1 arthropods molluscs sponge worms molluscs cnidarians arthropods worms sponges cnidarians 1 . They have got long , soft bodies : 2 . All of them have a hard exoskeleton : 3 . They are aquatic and live attached to the rocks : 4 . Their bodies are divided into segments : 5 : They move about with the sea currents : 6 . Most of them have got a shell to protect their bodies : 7 . Some of them can live inside our bodies and cause illnesses : 8 . They have poisonous tentacles that can sting you : 9 . They have soft bodies and some of them have two shells : 10 . Their sac - like bodies are covered with pores :