Hydromedusa. Medusa stage of the hydrozoan Sarsia tubulosa. Hydromedusae are the sexually reproductive stage of hydrozoan cnidarians. Hydrozoa live in large single-sex (dioecious) colonies made up of thousands of individual specialised polyps. Reproductive polyps bud-off asexually produced medusae. When mature,the medusae release gametes (sex cells) freely into the ocean. Gametes of opposite sexes,from different colonies,then combine to form free-swimming larval zygotes,that either settle on a suitable substrate,or swim and develop into another medusae or polyp directly | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Semenov, Alexander |
Bildgröße: | 3071 px × 3071 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |