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.

More August expeditions


The CSR Project has three new dates made available in August (starting 10th, 17th and 24th) at a special fee (798 Euro); IDP in Greece has also some dates have still places available. Places will be assigned on a first come first served basis.


Befriend a sperm whale

coda capodoglio


It’s a great present to someone you love – and you’ll support research and conservation of cetaceans. Choose between one of the sperm whales of the Sanctuary.

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Fin whales migrating



For the first time satellite tracking reveals north-south whale highway across the Mediterranean, intersecting one of the world’s busiest ship lanes

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Not just dolphins…

monk-seal-greeceMonk seals, a very rare species in the Mediterranean, have been sighted during the first survey in the inner Ionian Sea Archipelago in Greece – and not only one, but three of them! Join us in the field.

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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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CSR 10 (July 20th – 26th)

Wednesday July 29th, 2015

CSR 10 began with a good surprise for all participants: a trip to Corsica. The first day ended after a whole afternoon spent among whales. People could enjoy an outdoor.. read more

CSR 09 13th – 19th July

Saturday July 25th, 2015

What an amazing week onboard of Pelagos! During just five days of navigation participants could taste how rich the wildlife diversity in the Pelagos Sanctuary is. Not only cetaceans, but.. read more

CSR 08 (July 6th – 12th)

Wednesday July 15th, 2015

Participants of CSR08 left the boat well satisfied this Sunday. They were able to spot two couples of fin whales: one pair was feeding and the other one was travelling.. read more