Message from biologist, Monica Ross, regarding Xena's death:

I am very sorry to report Xena's carcass was recovered near Ft. Myers beach yesterday by FWC SW field staff.  This area has had an abnormally high mortality rate over the past week with red tide as the suspected cause.  At this time, we do not know the cause of her death but I will keep you informed of the necropsy results once notification is received.
 
Xena used Matlacha Isles throughout the winter of 2005/2006.  She was noted moving in/out of these canals to feeding areas on a routine basis which mimicked wild population use of this site.  Thus, she was usually in close association with other animals during our observations.  Our last sonic location of Xena in Matlacha Isles was on 2/19/07.  The last sighting we received of her location was in the Ft. Myers beach area on 2/26/07 reported to FWC by the public. 

Follow up information post-necropsy:

Katie Brill from FWC just informed me that Xena was 244 cm in length and weighed 313.5 kg or 690 lbs at the time of necropsy. The current findings for mortality was Natural/Other with no apparent clinical signs of red tide that are normally seen by necropsy.  There is a possibility there is a different kind of red tide effecting the animals in the Ft. Myers area thus producing different clinical signs than previously seen before. Samples were obtained and sent out for ELISA.