#4594 · 🐌 snails, slugs & other molluscs
Common Atlantic Slippersnail
🇳🇱 Muiltje ·Crepidula fornicata
8 photos from iNaturalist (Creative Commons) · credits & licences
what is it?
The common slipper shell , Crepidula fornicata , has many other common names, including common Atlantic slippersnail , boat shell , quarterdeck shell , fornicating slipper snail , Atlantic Slipper Limpet and it is known in Britain as the "common slipper limpet". This is a species of medium-sized sea snail, a marine gastropod mollusc in the family Calyptraeidae, the slipper snails and cup and saucer snails.
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 166 times in the Netherlands on iNaturalist: the #26 most seen of the snails, slugs & other molluscs in NL.
- 16,396 observations worldwide on iNaturalist.
- Scientifically named in 1758 (268 years ago).
- Not originally Dutch: it was introduced to the Netherlands.
fact sheet
- English
- Common Atlantic Slippersnail
- Nederlands
- Muiltje
- scientific name
- Crepidula fornicata
- class
- Gastropoda
- order
- Littorinimorpha
- family
- Calyptraeidae
- in NL
- introduced
- sightings in NL
- 166
- sightings in Europe
- 3,088
- sightings worldwide
- 16,396
- GBIF records in NL
- 40,714
- weight
- —
- length
- —
- lifespan
- —
- named
- 1758
Sources: iNaturalist taxon 125343, Wikidata Q469081, GBIF 5192789, Wikipedia (EN), Wikipedia (NL). Intro text from Wikipedia (CC BY-SA 4.0).Updated 2026-10-24.