Seanet High Intertidal

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Pachygrapsus crassipes Randall, 1839
Phylum Arthropoda, Subph. Crustacea, Class Malacostraca, Subcl. Eumalacostraca, Superorder Eucarida, Order Decapoda,  Infraorder Brachyura, Family Grapsidae

Lined shore crab; carapace trapezoidal with 2 antero-lateral teeth on each side; dark green-black with red or purple highlights on appendages; broken transverse lines across top of carapace, 40-45 mm across.

Abundant, but fast, cryptic & pugnacious; high to mid-intertidal zone, exposed & protected outer coast; feeds on algal films & scavenges.

Geo Range: central Oregon to Baja
Similar species: Hemigrapsus nudus has purple spots on chelae.