Great Eggcase Hunt

Record your Eggcase

Please select a language/region. The Great Eggcase Hunt is growing rapidly, and recording forms for more regions will be available soon. If you have found an eggcase outside one of these regions, please still log it using ‘Other’ and then include the eggcase species.

Complete the form below to record your eggcase(s).

If you're not sure about the species select 'don't know' in the species field and we'll identify this for you.

Contact Details
Seen developing underwater (e.g. while diving or snorkelling)

Type your location below and then select region from the list. Zoom in on the map, then click and drag the pin to the location of your sighting. This will automatically populate the coordinates – if you already know the coordinates, please enter them in decimal degrees.


The species list is not exhaustive, and contains the most commonly found coastal egglaying species in the region. If your species is not included in the list, or if you are outside one of our focus regions, please select ‘Other’ and include which species you think the eggcase is from.

Specimen #1
Supporting Image(s)

Upload a photo of your eggcase against a scale (such as a ruler) to help us verify your finding and improve the quality of the data.
If you prefer you can also email us a photo or send your eggcase to our office at the address below.

Add files...

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Please ensure all ( required) fields have been completed. If you have any problems recording your eggcase get in touch with us directly at