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.

Read More →

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

Read more   → 

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.

Read more   →


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.

Show all Pictures << >>


Recent updates

Show all Posts

CSR 04 (8th – 14th June)

Tuesday June 16th, 2015

How was the latest journey on board the research vessel “Pelagos” in the Cetacean Sanctuary? Here are a few highlights of team CSR 04: Tuesday We came across a small group.. read more

Three monk seals in Greece

Sunday June 14th, 2015

On 12th of June our colleagues of the Ionian Dolphin Project did their first survey in the Inner Ionian Sea Archipelago after a week working in the Gulf of Ambracia.. read more

” I developed a great fondness for these unique creatures…”

Monday June 1st, 2015

 We had a great week on the research boat and wish we could stay one week longer! The crew was caring, very nice and helpful. The first time we saw the sperm.. read more