#4545 · 🦀 crabs & other crustaceans
Pacific Rock Crab
Romaleon antennarium
🦀 Crabs & other crustaceans 📍 outside Europe
8 photos from iNaturalist (Creative Commons) · credits & licences
what is it?
Romaleon antennarium (formerly Cancer antennarius ), commonly known as the Pacific , Brown or California rock crab , is a crab of the genus Romaleon found on the western coast of North America.
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.
- 9,928 observations worldwide on iNaturalist.
- Scientifically named by William Stimpson in 1856 (170 years ago).
fact sheet
- English
- Pacific Rock Crab
- scientific name
- Romaleon antennarium
- class
- Malacostraca
- order
- Decapoda
- family
- Cancridae
- sightings in NL
- 0
- sightings worldwide
- 9,928
- GBIF records in NL
- 0
- weight
- —
- length
- —
- lifespan
- —
- named
- 1856 by William Stimpson
relatives· Cancridae
Sources: iNaturalist taxon 202315, Wikidata Q6496948, GBIF 5970317, Wikipedia (EN), Wikipedia (NL). Intro text from Wikipedia (CC BY-SA 4.0).Updated 2026-10-24.