Here's a jelly that doesn't like to swim. Although typically attached to something, they are capable of swimming when necessary. The bell is transparent, revealing the 4 orange to yellowish-tan gonads that lie along most of the length of the 4 radial canals. The pale yellow manubrium has 4 short frilly lips. Up to 80 tentacles line the bell margin, with about an equal number of statocysts.
Copepods are a favored prey.
Whereas Pacific Northwest Gonionemus vertens lacks a sting that is felt by people, the same species in the Russian Far-East is known to be venomous.