It has features similar to animals in the phylum Ctenophora (the comb jellies and their relatives) and Cnidaria (sea anemones, corals, and jellyfish), but it doesn’t fit neatly into either category.

A new study reaffirms that sponges are the oldest animal phylum – and restores the classical ... Sponges (Porifera), comb jellies (Ctenophora), the true jellyfish and corals (Cnidaria) and ...

Which phylum first branched ... There are five major branches of animals: Porifera (sponges), Cnidaria (jellyfishes, corals and related species), Ctenophora (comb jellies), Placozoa (Trichoplax ...