Dysidea etheria
Due to the fact that sponges are unable to move, they lack what we know as a digestive system. The way that the Ethereal Sponge obtains the nutrients that it requires to survive, it allows water, which is carrying different bacteria, to pass through it. When this happens the cells inside the sponge then obtain the food by the process of phagocytosis, and each individual cell then digests the food.