Sponges, the members of the phylum Porifera (; meaning "pore bearer"), are a basal Metazoa (animal) clade as a sister of the Diploblasts. They are multicellular organisms that have bodies full of pores and channels allowing water to circulate through them, consisting of jelly-like mesohyl sandwiched between two thin layers of cells. The branch of zoology that studies sponges is known as spongiology.
Porifera. Retrieved March, 04 2021, from https://en.wikipedia.org/wiki/Sponge.