Porifera /(?)/

Po·rif·e·ra

Porifera

n. pl.
  1. A grand division of the Invertebrata, including the sponges; -- called also Spongiæ, Spongida, and Spongiozoa. The principal divisions are Calcispongiæ, Keratosa or Fibrospongiæ, and Silicea. (Zool.)