#4495 · 🦀 crabs & other crustaceans

Northern Acorn Barnacle

🇳🇱 Gewone zeepok ·Semibalanus balanoides

🦀 Crabs & other crustaceans 📍 in the Netherlands

9 photos from iNaturalist (Creative Commons) · credits & licences

1. © hitchco · CC0
2. © Sequoia Janirella Wrens · CC BY-NC 4.0
3. © rorymacneil · CC BY-NC 4.0
4. © midnitedreary · CC BY-NC 4.0
5. © toadvark · CC BY-NC 4.0
6. © c michael hogan · CC BY-NC-SA 4.0
7. © Philip Mark Osso · CC BY-NC 4.0
8. © Carol McDougall · CC BY-NC 4.0
9. © hitchco · CC0

what is it?

Semibalanus balanoides is a common and widespread boreo-arctic species of acorn barnacle. It is common on rocks and other substrates in the intertidal zone of north-western Europe and both coasts of North America.

base stats

NL sightings 5iNaturalist, research grade
worldwide 11,233iNaturalist observations

Bars compare against all animals on log scales: up to 300,000 Dutch and 600,000 worldwide sightings (the most-seen species), 150 t (blue whale), 30 m and 400 years (Greenland shark).