Phylum Porifera are the lowest multicellular animals belonging to the kingdom Animalia. The word “Porifera” mainly refers to the pore bearers or pore bearing species. Based on the embryological studies, sponges are proved as animals and are classified into a separate Phylum in the animals This phylum includes about 5000 species.

Porifera, a Latin word that means bearing pores.Because if it's a sponge-like structure, it can absorb and hold the water for a long time. These species have a bundle of little needle-like structures called Spicules. And some of the big pores called Ostia which helps to draw into the interior canal called spongocoel.