Anderson, Dennis, Billy Williams, and Jonathon Mooney. "Animals Kingdom I." Animals Kingdom I. Dyersburg State Community College, n.d. Web. 16 Mar. 2015. .

"The Phylum Porifera." N.p., n.d. Web. 18 Mar. 2015. .

"Porifera." Porifera. N.p., n.d. Web. 18 Mar. 2015. .

"The Invertebrate Animals." The Invertebrate Animals. N.p., 8 May 2014. Web. 17 Mar. 2015. .

"Porifera: Life History and Ecology." Life History and Ecology of Porifera. N.p., n.d. Web. 17 Mar. 2015. .

"Investigation." About Sponges. Sarah Ianni, n.d. Web. 19 Mar. 2015. .