*The interdisciplinary workshop "Cetacean echolocation and outer space neutrinos: ethology and physics for an interdisciplinary approach to underwater bioacoustics and detection of astrophysical particles" will be held in October 2013, 18th-21st, in Erice, Sicily, hosted by the School of Ethology of the Ettore Majorana Centre. * The development of underwater ocean observatories has stimulated new interactions between disparate disciplines to optimize their sensors, layout and protocols. The workshop is intended to join different disciplines in the understanding of the underwater acoustic world and in the development of common research strategies and protocols to exploit the potential of Submarine Multidisciplinary Observatiories (learn more on the SMO project at http://web2.infn.it/smo/). Top scientists will present the state of the art in their peculiar disciplines and selected contributes will be presented by participants in a context open to discussion and knowledge sharing. Researchers, scientists, and students are all welcome in the exciting atmosphere of Erice to discuss their projects, results and ideas. Few places are still available ! Registration details and the workshop program are on the webpage http://www.unipv.it/cibra/erice The participation cost is particularly attractive as it includes full accomodation, a day trip, and transportation to and from the closest airport. For any information, please contact gianni.pavan@unipv.it Gianni Pavan, on behalf of the Organizing Committee -- Centro Interdisciplinare di Bioacustica e Ricerche Ambientali Università degli Studi di Pavia Via Taramelli 24, 27100 Pavia http://www.unipv.it/cibra http://mammiferimarini.unipv.it