iPhone Screenshots


The Great Eggcase Hunt is a Shark Trust citizen science recording project aiming to discover where different species of sharks and skate lay their eggs (which are protected in a toughened ‘eggcase’ or ‘mermaid’s purse’).

Get involved by heading to the beach in search of eggcases and use the app to identify what you’ve found. Report your mermaid’s purses to the global Great Eggcase Hunt; if in the Netherlands, to the Dutch Shark Society’s ‘Grote Eikapsel Jacht’; or, if in Portugal, to the Portuguese ‘APECE‘.

Key features of the app include:
• Advice on how best to prepare eggcases for identification
• Encyclopedia of egglaying sharks and skate commonly encountered in Northwest and Southwest Europe
• Species ID guides
• Step-by-step identification tool for eggcases in Northwest and Southwest Europe
• Recording form with access to GPS location and ability to take and upload photos
• User profile and logbook keeps track of your finds submitted via the app
• Capacity to change between English, Dutch and Portuguese for region/language

Established in 1997, the Shark Trust is the UK registered charity dedicated to safeguarding the future of sharks through positive change. It does this through science, education, influence and action.

What’s New

Version 1.7

- Submitted images are no longer cropped
- Minor fixes and improvements

Ratings and Reviews

mrj0100 ,

Awesome app!!!!

This is a clean, attractive, functional app. It is easy to use and the ID section is amazing! I highly recommend The Great Eggcase Hunt, and wish more citizen science apps were as useful and well thought out as this app.

App Privacy

The developer, Shark Trust, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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