| 1 | The type of group life, the Hydra diameter of 1-3 mm. | |
| 2 | During the right season, the new colony will produce several new jellyfish - and so the rise of the immortal begins. | |
| 3 | The two key link in many types of jellyfish are generational-type and Hydra type. | |
| 4 | Beneficial to all corals (stony and soft), as well as solitary and colonial polyps. | |
| 5 | A hydromedusa spreads its luminescent tentacles in the Weddell Sea near Antarctica. |