Polypoid generation in the White sea practically is poorly investigated[2] The bell is transparent and has a spherical shape.

Manubrium is brown with reddish tinge, darker in males and whitish in females after forming eggs and planulas on it.

[3] Gestation of eggs by females is timed to the warming up period of surface layers of the sea, when the temperature rises to 10-15°C.

By the end of June eggs turn into ciliated planula larvae, which start an independent life in the water column.

At this time jellyfish stop eating, the walls of their stomachs are thinning, and their tentacles stick together and hang motionless.

[1] Most of the time jellyfish hangs in the water column or it is carried over by tidal currents near the surface of the sea.

Planktonic crustaceans encounter stinging cells on tentacles of the outer circle of the jellyfish.