DR NEIL OVERY / SCIENCE PHOTO LIBRARY DR NEIL OVERY / SCIENCE PHOTO LIBRARY
Natural sponges for sale. Sponges (phylum Porifera) are simple multicellular aquatic animals. They have bodies full of pores and channels (seen here) that allow water to circulate through them. This characteristic means they can hold water well and dead sponges are often used as bath sponges. Photographed in Corfu Town, Greece.
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