breadcrumb Field Guide: Food Web - Animals: Intertidal Shore Crab

Food Web

Animals: Intertidal Shore Crab
Hemigrapsus oregonensis

Intertidal Shore Crab

Intertidal Shore Crab

These small crabs are about 3.4 centimeters across their back shell, called the carapace. They are yellow-green or gray and have dull, olive-colored hairs on their legs.

They are most commonly found on open mud flats and in mats of green alga or beds of eelgrass. They can also be found in rocky habitats within estuaries and gravel shores.

They feed mostly at night, scraping up single-celled organisms called diatoms and cutting algae.

Shore crabs are good diggers and are able to bury themselves in the sand rapidly.

Intertidal Shore Crab

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