Species facts

Meet the remarkable species of our rock pools

Rock pools are bursting with life, and every species has its own unique background. Click on any tile below to explore clear, easy-to-read facts about their lifespan, reproduction, diet and more.

Join the discussion

Every month we share information about specific species groups in our Big Rock Pool Challenge Facebook Group. Want to share interesting facts about your favourite species, link up with fellow rock pool enthusiasts, or ask a question of your own? Join the group today!

Join the group

Click on one of the tiles below to learn more:

All about sponges

Spotted Seahare (Aplysia punctata)

Celtic Sea Slug (Onchidella celtica)

Sea Lemon (Archidoris pseudoargus)

Explore the data

We collect data via iNaturalist at all of our Big Rock Pool Challenge events. This information can be used to help track the health and biodiversity of our rocky shore communities.
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The links below show data for key rock pool species groups, including the most common species, maps of where they're found, and numbers of records. Dive in!

Sea slugs of the UK A handy guide to all the sea slugs recorded on iNaturalist so far in the UK so you can see which ones are the most and least common.