Cephea sp., Palau

On 03-19-2010 at 14:20 while SCUBA diving I observed this one solitary Cephea sp. specimen actively swimming South with the .5kt current. No other gelatinous zooplankton were seen in the vicinity.
ID verification by Mike Dawson.
Bottom depth-9m;
Jelly depth-3.6m;
Jelly size-Bell approximately 18cm;
Bottom substrate-Mostly acroporid corals;
Water temperature-27.7˚;
Sea condition-Calm, Sky-
Full sun; Tide-0.15-falling;
Palau, Koror, "ioul Lukes reef";
07’17”.238˚North
134’30”.204˚East