Porpita umbela hydrozoan

Porpita umbela hydrozoan

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Credit: DR KEITH WHEELER/SCIENCE PHOTO LIBRARY

Caption: Porpita umbela hydrozoan, light micrograph. This is a small specimen of this colonial marine organism, which consists of a collection of specialised polyps. A mature colony can be 8 centimetres in diameter. The hydrozoan's pneumatophore (buoyancy structure, centre, dark) is disc-shaped. Below this is the feeding polyp, surrounded by reproductive polyps and sensory polyps (tentacle-like structures) arranged in rings of several rows. This hydrozoan is found in the Mediterranean and Atlantic areas, where it occurs in great shoals. Magnification: x14 when printed at 10 centimetres across.

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Keywords: 1, anatomical, anatomy, animal, atlantic, bell, biological, biology, coelenterate, colonial, colony, cut out, cut outs, cut-out, cut-outs, cutout, cutouts, fauna, feeding polyp, histological, histology, hydrozoa, hydrozoan, invertebrate, invertebrates, light micrograph, light microscope, lm, marine biology, mediterranean, nature, one, pneumatophore, polyp, polyps, porpita umbela, reproductive polyps, sensory polyps, single, tentacle, tentacles, wildlife, zoological, zoology

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