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Morro Bay: Under the Surface
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Morro Bay: Under the Surface
  • Home
    • Credits and References
  • Plants and Algae
    • Eelgrass
    • Ulva
    • Giant Kelp
  • Invertebrates
    • Red-Rust Bryozoan
    • Feather Duster Worm
    • White Anemone
    • Starburst Anemone
    • Bat Star
    • Sand Dollar
    • California Sea Hare
    • California Aglaja
    • Moon Snail
    • California Bubble Snail
    • Mossy Chiton
    • Eelgrass Isopod
    • Kelp Crab
    • Striped Shore Crab
    • Hairy Shore Crab
    • Purple Shore Crab
    • Graceful Rock Crab
    • Sandflat Elbow Crab
    • Blueband Hermit Crab
    • Pacific Rock Crab
  • Fish
    • Bay Pipefish
    • Staghorn Sculpin
    • Topsmelt
    • Dwarf Perch
    • Pacific Sanddab
    • Round Stingray
  • Marine Mammals
    • Sea Otter
    • California Sea Lion
    • Harbor Seal
  • More
    • Home
      • Credits and References
    • Plants and Algae
      • Eelgrass
      • Ulva
      • Giant Kelp
    • Invertebrates
      • Red-Rust Bryozoan
      • Feather Duster Worm
      • White Anemone
      • Starburst Anemone
      • Bat Star
      • Sand Dollar
      • California Sea Hare
      • California Aglaja
      • Moon Snail
      • California Bubble Snail
      • Mossy Chiton
      • Eelgrass Isopod
      • Kelp Crab
      • Striped Shore Crab
      • Hairy Shore Crab
      • Purple Shore Crab
      • Graceful Rock Crab
      • Sandflat Elbow Crab
      • Blueband Hermit Crab
      • Pacific Rock Crab
    • Fish
      • Bay Pipefish
      • Staghorn Sculpin
      • Topsmelt
      • Dwarf Perch
      • Pacific Sanddab
      • Round Stingray
    • Marine Mammals
      • Sea Otter
      • California Sea Lion
      • Harbor Seal


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Hairy Shore Crab

Hemigrapsus oregonensis


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slate green crab with square carapce and mottled black and orange colors. perched on some brown ripply seaweed

Common Name: Hairy Shore Crab

Scientific Name: Hemigrapsus oregonensis

Kingdom, Phylum, Class, Order, Family: Animalia, Arthropoda, Malacostraca, Decapoda, Grapsidae

Diet: Scavenger, diatoms, green algae and meat if available

Habitat: Mud flats, algal mats, eelgrass beds, bays, estuaries, beaches

Range: Alaska to Mexico

Identification: Olive and brown carapace, with purple/black spotting, hairy legs, no purple spotting on white chela (claws)

Reproduction: Eggs develop underneath the female’s abdomen, 100-11,000 eggs

Behavior: Always stay together with Hemigrapsus nudus (purple shore crab)

Predators: Birds, fish and larger crabs

Citations:Johnson and Snook, 1927.Light, Sol Felty. 2007.Oliver, Jennifer, and Anja Schmelter.Wong, Karen.2005.




© Iliana Arroyos, 2018
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