A non-profit organisation for the study and the conservation of the marine environment

Tethys has contributed since 1986 to marine conservation, at national and international levels, through the provision of scientific knowledge.

The Institute has been investigating the ecology of marine species,

most notably whales and dolphins, in research campaigns involving paying volunteers,

that are among the earliest citizen science projects in the Mediterranean.

Join us at sea! Everyone can participate.



JOIN US  in Greece


IDP teams in Greece will be going on from June to September: please check out the new dates and fees for 2016. Also detailed info is already available.



JOIN US  in Italy

fin whaleCetacean Sanctuary Research teams in the northwestern Mediterranean will go on until September:  dates and fees for 2016 are on line. See also all detailed info.


Special offers

last minute offer-1The team of Ionian Dolphin Project IDP 04 (June 26th – July 2nd) in Greece has still a few spaces available at a special last-minute fee (20% off ). If interested please send a mail as soon as possible to tethys@tethys.org

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Tethys turns 30

Tethys Research Institute 30 years logo

Read the highlights of Tethys’ activities in research, conservation and awareness, from 1986, under the menu “Activities“, or the special summary in ITALIANO

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A series of best pictures regarding Tethys' ongoing long term research projects conducted in the Mediterranean which you can join: CSR in the Pelagos Sanctuary, Ligurian Sea on board the RV "Pelagos", and IDP in the coastal waters of Greece.

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Recent updates

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Highlights from the latest cruise: CSR 6 (June 20th – 26th)

26 June 2016

An intense sighting day on board of Pelagos during the Summer solstice: lots of ‪dolphins‬ and a couple of fin ‪whales‬. A huge ‪sunfish‬ “pretending” to be a ‪‎dolphin‬; it.. read more

Highlights from the latest cruise: CSR 5 (June 13th – 19th)

22 June 2016

Enjoy a few moments from the last week, by the CSR team number 5. While visiting the Oceanographic Museum of Monaco Pelagos’s crew found a picture showing the Sanctuary After a.. read more

Highlights from the latest cruise: CSR 4 (June 6th – 12th)

11 June 2016

During their first day at sea this week, the team on board of “Pelagos” spotted the first couple of fin whales of this season. Precious data were collected: behaviour and.. read more