| Sea-nettles, or medusae, are well known to constitute the principal food of that species of whale which is termed the right whale. |
| In polyps, medusae, and worms, all longitudinal and circumferential muscles attach to the thin body wall over a wide area. |
| There are three subgroups within the cnidarians that have medusae, cubozoans, hydrozoans, and scyphozoans. |
| Gorgonocepahlus caput medusae, lives 290 metres down in the Skagerak region off the Norwegian coast. |
| It is possible that fluorescence in these medusae represents a daylight functional analog of bioluminescence. |
| Scyphozoan medusae differ from those of hydrozoans in lacking a velum. |
