First record of Craspedacusta sowerbyi Lankester, 1880 (Cnidaria : Limnomedusae : Olindiidae) in the Proserpina Reservoir (Extremadura, SW Spain) with notes on their feeding habits

The first record of the invasive freshwater jellyfish Craspedacusta sowerbyi Lankester in the Proserpina Reservoir, a shallow reservoir in the Extremadura region of SW Spain is reported in this paper. C. sowerbyi was recorded in open water away from the immediate littoral zones. All individuals captured were females with bell diameters ranging from 7-21 mm. Tentacle numbers ranged from 218 to 398. The stomach contents included most of the taxa abundant in the zooplankton, with Daphnia longispina being the most abundant.