#4857 · 🪼 jellyfish, starfish, worms & co
Green Sea Urchin
🇳🇱 Gewone zeeappel ·Psammechinus miliaris
🪼 Jellyfish, starfish, worms & co 📍 in the Netherlands
📍 Noordwijk, Zuid-Holland, Netherlands
📍 Grevelingen, Ouddorp, Zuid-Holland, NL
📍 Wassenaar, NL-ZH, NL
📍 Wassenaar, NL-ZH, NL
📍 Grevelingenmeer, South Holland, NL
📍 9166 NK Schiermonnikoog, Nederland
10 photos from iNaturalist (Creative Commons) · credits & licences
- 1. © Poul Erik Rasmussen · CC BY-NC 4.0
- 2. © Ian Boyd · CC BY-NC 4.0
- 3. © eugenielefranc · CC BY-NC 4.0
- 4. © Paul G. Schrijvershof · CC BY-NC-ND 4.0
- 5. Noordwijk, Zuid-Holland, Netherlands:© Michel Langeveld · CC BY 4.0
- 6. Grevelingen, Ouddorp, Zuid-Holland, NL:© no rights reserved · CC0
- 7. Wassenaar, NL-ZH, NL:© Rob Westerduijn · CC BY-NC 4.0
- 8. Wassenaar, NL-ZH, NL:© Rob Westerduijn · CC BY-NC 4.0
- 9. Grevelingenmeer, South Holland, NL:© daniellegeschiere · CC BY-NC 4.0
- 10. 9166 NK Schiermonnikoog, Nederland:© Anja Cervencl · CC BY-NC 4.0
what is it?
Psammechinus miliaris is a species of sea urchin in the family Parechinidae. It is sometimes known as the green sea urchin or shore sea urchin . It is found in shallow areas of the eastern Atlantic Ocean and the North Sea.
base stats
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).
fun facts
- Spotted 175 times in the Netherlands on iNaturalist: the #11 most seen of the jellyfish, starfish, worms & co in NL.
- 2,100 observations worldwide on iNaturalist.
- Scientifically named by Philipp Ludwig Statius Müller in 1771 (255 years ago).
fact sheet
- English
- Green Sea Urchin
- Nederlands
- Gewone zeeappel
- scientific name
- Psammechinus miliaris
- class
- Echinoidea
- order
- Camarodonta
- family
- Parechinidae
- sightings in NL
- 175
- sightings in Europe
- 1,619
- sightings worldwide
- 2,100
- GBIF records in NL
- 513
- weight
- —
- length
- —
- lifespan
- —
- named
- 1771 by Philipp Ludwig Statius Müller
relatives· Parechinidae
Sources: iNaturalist taxon 210280, Wikidata Q226135, GBIF 2278834, Wikipedia (EN), Wikipedia (NL). Intro text from Wikipedia (CC BY-SA 4.0).Updated 2026-10-24.