Species · GBIF taxon 2225812
Striped Shore Crab
Pachygrapsus crassipesAlso known as Lined Shore Crab, Striped Rock Crab
Striped shore crabs are highly active, semi-terrestrial crustaceans that scurry across rocky intertidal zones, easily recognized by the dark green or purple transverse stripes across their square-shaped shells. They spend more time out of water than in it, clinging to wet rock faces and retreating into crevices with remarkable speed when approached. To breathe air, they recirculate water over their gills, creating a characteristic bubbling sound around their mouths.
IntertidalCrustaceanDiurnal
—observations
—countries
—peak records
Least ConcernConservation statusIUCN Red List categoriesLCNTVUENCREWEXLeast ConcernRed List categories, explained →
Diet & prey
- Green Algae
- Microscopic Detritus
- Small Invertebrates
Predators
- Gulls
- Raccoons
- Shorebirds
ThreatsCoastal development, water pollution, ocean acidification, and heavy foot traffic in tide pools.
HabitatsRocky intertidal zones, tide pools, salt marshes, and hard-mud estuaries.
Life span3 to 5 years
Size / weightNot available
Classification
- FamilyGrapsidae
- SpeciesPachygrapsus crassipes
Range data is not available yet.
Interaction riskLow
- Low
- Moderate
- High
- Very high
- Why interaction risk is low
- Can pinch sharply with their claws if handled; observe them scurrying on the rocks from a safe distance.
- Why it is dangerous
- Equipped with strong, sharp claws used for scraping algae and defense, which can deliver a painful pinch that may break the skin.
- How to recognize a risky encounter
- Look for a square, dark green or purple carapace with distinct horizontal stripes and bright purple claws.
- What to do
- Do not attempt to pick them up or corner them in rock crevices; enjoy watching their rapid scurrying from a respectful distance.
Responsible observation
- Approach slowly: These crabs have excellent vision and will quickly dart into deep rock crevices if they detect sudden movement.
- Watch the tide: Look for them on vertical rock faces just above the water line during low tide, where they graze on algae.
- Avoid handling: Their powerful claws can deliver a painful pinch, so it is best to watch their active behaviors without picking them up.
Co-occurring Predator Taollan82; Kirt L. Onthank / CC BY-SA 3.0 · cc-by-sa
Predator (c) Mike Baird, some rights reserved (CC BY) · cc-by
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