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The composition, distribution, abundance and community ecology of jellyfish and siphonophores were studied during the wet period from December 2015 to May 2016 in six stations located in the coastal area of ​​Ancon, Anconcito and Punta Carnero (Ecuador), from 51 zooplankton samples collected by surface and vertical trawl. 22 species of jellyfish classified into 5 orders, 14 families and 16 genre and 14 species of siphonophores with 1 order, 2 suborders, 4 families and 10 genre were identified. In February, the most abundant species were Aglaura hemistoma, Liriope tetraphylla in March , Obelia sp. and Proboscidactyla ornata in February, Nanomia bijuga in April, Muggiaea atlantica in February, Sulculeolaria chuni and Diphyes dispar in March was collected at surface level, while at vertical sampling (10 meters) were Proboscidactyla ornata in February, Liriope tetraphylla, Solmundella bitentaculata, Obelia sp., Muggiaea atlantica and Nanomia bijuga in April. The highest diversity in jellyfish was 2.14 bits were found  in the vertical sampling for April, while to siphonophores at superficial level was 1.67 bits, for December. The Bray-Curtis similarity determined at E2, E3 and E4 stations as the most related by their highest abundances. The canonical correspondence analysis emphasized the relationship between Obelia sp. and Muggiaea atlantica with temperature and Liriope tetraphylla with salinity. Overall, fauna jellyfish and siphonophores showed a representative ecological affinity for tropical and subtropical waters as well as the presence of cosmopolitan, neritic and oceanic species, study of vital importance to associate them in future investigations to the El Nino Event.

Distribución y ecología de medusas y sifonóforos en tres estaciones de la zona marino costera de la Península de Santa Elena, Ecuador