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 | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Wheeler, Dr. Keith |
Taille de l’image : | 7000 px × 3356 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |