phylum porifera(n = noun.animal) porifera - coextensive with the subkingdom Parazoa: sponges;
is a kind of phylum
is a member of parazoa, subkingdom parazoa

phylum, phylum acanthocephala, phylum annelida, phylum arthropoda, phylum aschelminthes, phylum brachiopoda, phylum bryozoa, phylum chaetognatha, phylum chordata, phylum cnidaria, phylum coelenterata, phylum cryptophyta, phylum ctenophora, phylum cycliophora, phylum echinodermata, phylum ectoprocta, phylum entoprocta, phylum mollusca, phylum nematoda, phylum nemertea, phylum nemertina, phylum phoronida, phylum platyhelminthes, phylum pogonophora, phylum protozoa, phylum pyrrophyta, phylum rotifera, phylum sipuncula, porifera