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Marbled rock crab (Pachygrapsus marmoratus)

Photo of Marbled rock crab (Pachygrapsus marmoratus)

Key facts

Scientific name
Pachygrapsus marmoratus
Common name
Marbled rock crab
Category
Crustaceans
Family
Grapsidae
Genus
Pachygrapsus
Size
3–4 cm
Depth
0–10 m
IUCN status
Least concern (LC)
Danger level
Harmless
Habitats
rocky
Behaviours
fast-moving, omnivorous
Ocean zones
East Atlantic, Macaronesia, Mediterranean

Description

Pachygrapsus marmoratus is a small crab of 3 to 4 cm with an almost square carapace marbled in green, brown and bronze. It lives in the intertidal zone on rocks, sheltering in crevices. Extremely fast and agile, it sometimes jumps out of water to escape a predator. Omnivorous, it feeds on algae and debris. An iconic species of Mediterranean and Atlantic coasts.

Photo of Marbled rock crab

Photo of Marbled rock crab (Pachygrapsus marmoratus)Photo of Marbled rock crab (Pachygrapsus marmoratus)Photo of Marbled rock crab (Pachygrapsus marmoratus)

Frequently asked questions

How big is the Marbled rock crab?
Marbled rock crab (Pachygrapsus marmoratus) reaches 3–4 cm in length.
At what depth can you find the Marbled rock crab?
Marbled rock crab is found between 0–10 m deep.
Is the Marbled rock crab dangerous to divers?
Danger level: Harmless.
What is the conservation status of the Marbled rock crab?
IUCN status: Least concern (LC).
Where can you find the Marbled rock crab?
Found in: East Atlantic, Macaronesia, Mediterranean.

Similar species

  • Palinurus elephas - European spiny lobster
  • Clibanarius erythropus - Red-legged hermit crab
  • Homarus gammarus - European lobster
  • Mithraculus forceps - Red-ridged clinging crab
  • Mithrax spinosissimus - Channel clinging crab
  • Periclimenes yucatanicus - Spotted cleaner shrimp

Sources

  • Taxonomy: WoRMS (AphiaID 107455)
  • Photos: iNaturalist (CC BY-NC)
  • Distribution: GBIF (taxonKey 2225815)
  • Conservation: IUCN Red List
  • Encyclopedia: Wikipedia