Sharks play an essential rol in the health of our oceans

Citizen science

Citizen science‘ is research, that uses data and support from members ofthe public, like observations, submission of photographs, participation in research projects. Participants do not have to be experts, in some cases not even a diver or snorkeller.

In Europe, there are several projects, for which members of the public report observations of egg cases of rays and sharks. On of them is of course our own ‘Grote Eikapseljacht (, that is the Dutch equivalent of the Shark Trust’s ‘Great Eggcase Hunt“. The collected information about the number of found egg cases delivers data about species and populations and is collected in a European-wide database. Similar projects will be started all over the world.

Another eggcase project has been set up in Italy, Mermaid’s Purse. Divers and snorkellers report where, under which circumstances and how many egg cases of catsharks they have found during their dive and snorkeltrips. The info is also published on the internet. Each year, project leader Eleonora de Sabata organizes the Bioblitz, a special event for divers and underwater photographers to check and document all catshark eggcases in the Gulf of Naples. The Dutch Shark Society supports this project financially.

The egg of a catshark with a baby shark inside







The Dutch Shark Society is also a partner in a research project of the University of Padova, that studies the attitude towards sharks. You can find the questionnaire here:


Fill out the shark questionnaire!






Other projects collect data in databases of pictures and observations of manta rays and sharks:



For whale shark sightings:



The website eOceans links to several sightings databases:

The Shark Trust also has a Shark Sightings Database:

Or visit the database of Shark Base:

Take your  pick, and contribute to science!

Contact info

You can contact us at +31 (0) 6 12195593 Or per email at:

Privacy Statement

Read our privacy statement here

Partner organisations

De Dutch Shark Society is proud to be a partner of several organisations. Check out our Mission page!
Show Buttons
Share On Facebook
Share On Twitter
Share On Pinterest
Contact us
Hide Buttons