Campanularia hydrozoan, light micrograph

Campanularia hydrozoan, light micrograph

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Credit: DR KEITH WHEELER/SCIENCE PHOTO LIBRARY

Caption: Campanularia hydrozoan. Polarised light micrograph of a hydroid colony of Campanularia polyps. The branches of the stem give rise to either feeding polyps (hydranths, smaller structures) surrounded by a cup (hydrotheca) or reproductive polyps (larger structures) in a closed flask (gonotheca). The feeding polyps have tentacles with stinging cells (nematocysts) that inject poison into prey. The reproductive polyps bud off circular medusae (young polyps), which are either male or female. The mature medusae are then liberated into the sea. Magnification: x36 when printed at 10 centimetres across.

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Keywords: anatomical, anatomy, animal, biological, biology, campanularia, coelenterate, fauna, feeding polyp, feeding polyps, gonotheca, hydranth, hydranths, hydroid, hydrotheca, hydrozoan, invertebrate, invertebrates, light micrograph, light microscope, lm, marine biology, nature, polarised, polarized, polyp, reproduction, reproductive, reproductive polyp, reproductive polyps, wildlife, zoological, zoology

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