Sponges don't have internal organs. They don't have muscles, a nervous system, or a circulatory system. Their walls are lined with many small pores called ostia that allow water flow into the sponge. ... Sponges are able to get microorganisms such as algae and bacteria for food through openings.
The lack of sunlight in deep oceans limit these types of organisms that can survive
Production, transport, use and disposals
D. Understand your personal heritage and it's basis in cultural values
