Cetacean sightings in the north western Mediterranean Sea by GREC – EPHE – EcoOcéan Institut, 1996-1997

Groupe de Recherche sur les Cétacés (GREC) is a non-profit fully benevolent research organization which was created in 1991 in Antibes (France).. GREC is totally independent from governmental organizations.

GREC has organized, or formally participated to, numerous boat surveys in:
- western and eastern Mediterranean
- north eastern Atlantic
- French Polynesia
- French West Indies
Most of the surveys were carried out in a 'combined visual/acoustic' mode, with a towed hydrophone.
GREC members are authors or co-authors of more than 30 scientific papers.

EcoOcéan Institut is a non-governmental organization, with professional researchers working in the north-western Mediterranean Sea on cetaceans, turtles and seabirds since 1994. Campaigns at sea are dedicated to data collection (marine animals, maritime traffic, marine debris) and the research methods used are mainly "line transect" and "photo-identification."