Sponge spicule, SEM

Sponge spicule, SEM

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Caption: Sponge spicule. Coloured scanning electron micro- graph (SEM) of a spicule (grey) from the sponge Tethya wilhelma. Sponges are aquatic organisms which filter food from the water. They are a loose aggregation of cells supported by spicules, needles of siliceous or calcareous minerals. Tethya sp. sponges are supported by siliceous spicules along with fibres of the protein spongin. Magnification: x3600 at 6x6cm size.

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Keywords: animal, coloured, invertebrate, invertebrates, nature, porifera, poriferan, scanning electron micrograph, sem, silica, siliceous, silicious, spicule, sponge, tethys wilhelma, wildlife, zoology

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