#4550 · 🦀 crabs & other crustaceans
Thin-shelled Rock Crab
🇳🇱 Groene Rotskrab ·Grapsus tenuicrustatus
🦀 Crabs & other crustaceans 📍 outside Europe
9 photos from iNaturalist (Creative Commons) · credits & licences
what is it?
Grapsus tenuicrustatus , commonly known as Thin-shelled rock crab or Natal lightfoot crab , is a species of decapod crustacean in the family Grapsidae.
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
- No confirmed wild sightings in the Netherlands on iNaturalist: you'd have to travel for this one.
- 8,342 observations worldwide on iNaturalist.
fact sheet
- English
- Thin-shelled Rock Crab
- Nederlands
- Groene Rotskrab
- scientific name
- Grapsus tenuicrustatus
- class
- Malacostraca
- order
- Decapoda
- family
- Grapsidae
- sightings in NL
- 0
- sightings worldwide
- 8,342
- GBIF records in NL
- 0
- weight
- —
- length
- —
- lifespan
- —
relatives· Grapsidae
#4533 📷 10Striped Shore Crab
Pachygrapsus crassipes
🌍 35.5k seen
#4538 📷 10Sally Lightfoot Crab
Grapsus grapsus
🌍 17.5k seen
#4506 📷 8Marbled Crab
🇳🇱 Gemarmerde rotskrab
Pachygrapsus marmoratus
🌍 14.8k seen
#4555 📷 10Purple Rock Crab
Leptograpsus variegatus
🌍 6.9k seen
#4556 📷 7Mottled Lightfoot Crab
🇳🇱 Witgestreepte Rotskrab
Grapsus albolineatus
🌍 6.9k seen
#4512 📷 10East Atlantic Sally Lightfoot Crab
Grapsus adscensionis
🌍 5.5k seen
Sources: iNaturalist taxon 61373, Wikidata Q6495968, GBIF 2225821, Wikipedia (EN), Wikipedia (NL). Intro text from Wikipedia (CC BY-SA 4.0).Updated 2026-10-24.