#4881 · 🪼 jellyfish, starfish, worms & co
Sand Mason Worm
🇳🇱 Schelpkokerworm ·Lanice conchilega
🪼 Jellyfish, starfish, worms & co 📍 in the Netherlands
📍 Wassenaar, NL-ZH, NL
📍 Zeeuwse meren, 158_13_400, NL
📍 Den Helder, Nederland
📍 Schouwen-Duiveland, Pays-Bas
📍 Schiermonnikoog, Schiermonnikoog, Friesland, Netherlands
📍 Zijpe, NL-NH, NL
📍 Velsen
📍 Vlieland, Nederland
10 photos from iNaturalist (Creative Commons) · credits & licences
- 1. © Ana Santos · CC BY-NC 4.0
- 2. © François Roche · CC BY-NC 4.0
- 3. Wassenaar, NL-ZH, NL:© Rob Westerduijn · CC BY-NC 4.0
- 4. Zeeuwse meren, 158_13_400, NL:© Frédéric ANDRE · CC BY-NC 4.0
- 5. Den Helder, Nederland:© teddydolstra · CC BY-NC 4.0
- 6. Schouwen-Duiveland, Pays-Bas:© Frédéric ANDRE · CC BY-NC 4.0
- 7. Schiermonnikoog, Schiermonnikoog, Friesland, Netherlands:© Michel Langeveld · CC BY 4.0
- 8. Zijpe, NL-NH, NL:© 05gi02el03 · CC BY-NC 4.0
- 9. Velsen:© wummus63 · CC BY-NC 4.0
- 10. Vlieland, Nederland:© Paul G. Schrijvershof · CC BY-NC-ND 4.0
what is it?
Lanice conchilega , commonly known as the sand mason worm , is a species of burrowing marine polychaete worm. It builds a characteristic tube which projects from the seabed, consisting of cemented sand grains and shell fragments with a fringe at the top.
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 36 times in the Netherlands on iNaturalist: the #35 most seen of the jellyfish, starfish, worms & co in NL.
- 1,601 observations worldwide on iNaturalist.
- Scientifically named by Peter Simon Pallas in 1766 (260 years ago).
fact sheet
- English
- Sand Mason Worm
- Nederlands
- Schelpkokerworm
- scientific name
- Lanice conchilega
- class
- Polychaeta
- order
- Terebellida
- family
- Terebellidae
- sightings in NL
- 36
- sightings in Europe
- 1,233
- sightings worldwide
- 1,601
- GBIF records in NL
- 45,551
- weight
- —
- length
- —
- lifespan
- —
- named
- 1766 by Peter Simon Pallas
Sources: iNaturalist taxon 204568, Wikidata Q1019295, GBIF 2325106, Wikipedia (EN), Wikipedia (NL). Intro text from Wikipedia (CC BY-SA 4.0).Updated 2026-10-24.