Question: what animals are not chordates?
Answer: Members of phylum Porifera, Coelenterata, Ctenophora, Platyhelminthes, Aschelminthes, Annelida, Arthropoda, Mollusca, Echinodermata and Hemichordata fall under Non-chordates. The general characteristic features of Non-Chordates are: They are cylindrical, triploblastic, coelomate, or pseudocoelomate animals.