WAtolla
WAtorella
WAurelia (cnidarian)
WCatostylus
WCephea
WCotylorhiza
WCyanea (jellyfish)
WDeepstaria
WDesmonema (jellyfish)
WDiplulmaris
WDrymonema
WEupilema inexpectata
WFloresca
WMastigias
WNetrostoma
WParaphyllina
WPelagia (cnidarian)
WPhyllorhiza
WPoralia
WRhizostoma
WRhopilema
WSanderia
WStellamedusa
WSthenonia
WStomolophus
WStygiomedusa
WTiburonia
WUlmaris