Sponges are multicellular organisms consisting of jelly-like mesohyl sandwiched between two thin layers of cells, and usually have tube-like bodies full of pores and channels that allow water to circulate through them.
Sponges are found in a wide variety of colors, shapes, and sizes and are often mistaken for plants. Scientists believe that their varied colorations may protect them from the sun’s harmful ultraviolet rays.
Sponges live in intimate contact with water, which plays a role in their feeding, gas exchange, and excretion. Much of the body structure of the sponge is dedicated to moving water through the body so it can filter out food, absorb dissolved oxygen, and eliminate wastes.
Sponges (phylum Porifera) are simple, mostly marine animals that lack true tissues and organs. They live attached to surfaces and feed by pumping water through a porous body, filtering out bacteria and organic particles.
Sponges may look like plants, but they’re filter-feeding animals. See how they pump seawater, catch particles as small as bacteria, and reproduce with larvae.
Sponges are primitive animals with no organs, living mostly in marine environments. There are three main sponge types: glass sponges, demosponges, and calcareous sponges, each with unique features. Sponges filter water to get food and oxygen through their porous body walls.
Currently, there are around 5000-10, 000 known species on the planet. As some of the most abundant and widespread sea species, they can be found from the colder arctic waters to the warmer tropics. The universal nature of the sea sponges makes them vital to the oceanic ecosystem.
Sponges help create habitat, filter particles from seawater, contribute to carbon, nitrogen, and silica cycling. They have also been used for bathing since ancient Egypt.