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Creature Feature: Black-Fingered Mud Crab

6/26/2017

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Picture
Panopeus herbstii, also known as the Atlantic mud crab or the black-fingered mud crab, lives in salt marshes and reefs along the East Coast, and is common in the waters of the Chesapeake. Their sandy brown color makes them tough to spot, but look for these small crustaceans in brackish waters underneath rocks or in clumps of seaweed. The crabs have also been known to hide in bottles, cans, and other trash. It’s fortunate that the black-fingered mud crab has been able to adapt to this pollution, however, other types of human impact still pose a threat to the species.

There's two ways you can tell if a crab is a black-fingered mud crab just by looking at its claws. One is to look for dark colored tips on the ends, or "fingers," of its claws, and the other characteristic to look for is a "tooth" on the larger of the crab's two claws. They use this larger claw to hunt their prey.

Common prey for the mud crab is the marsh periwinkle snail. Black-fingered mud crabs help maintain healthy snail populations, and this benefits marsh ecosystems because if snail populations get too high, they could destroy the plant life in a wetland. 

Keep an eye out for these cute crustaceans next time you are near a marsh!
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  • HOME
  • University & Research
    • SUMMER COURSES >
      • REGISTRATION & FEES
      • STUDENT LIFE
    • FIELD TRIPS >
      • FACILITIES
      • ACTIVITIES & SITES
      • FIELD TRIP FEES
    • RESEARCH >
      • STUDENT RESEARCH
      • FACULTY & INDEPENDENT RESEARCH
    • Alternative Spring Break
  • PROGRAMS
    • SCHOOL PROGRAMS >
      • GENERAL INFO
      • CLASSES
      • OUTREACH
      • FAQ
      • FUNDING OPPORTUNITIES
    • YOUTH CAMPS >
      • DAY CAMPS
      • OVERNIGHT CAMPS
      • CAMP ACTIVITIES
      • FAQ
    • ROAD SCHOLAR >
      • Bicycling the Eastern Shore of Virginia
      • Birding Virginia's Eastern Shore
      • Discover the Islands of Virginia's Eastern Shore
      • Kayaking the Eastern Shore
      • Share a Marine Science Adventure with your Grandchild
    • FAMILY CAMPS
    • FRIDAY ADVENTURE SERIES >
      • FRIDAY ADVENTURE SERIES BIKE TOUR
      • FRIDAY ADVENTURE SERIES KAYAKING
      • MARSH MYSTERIES CLASS
      • INTERTIDAL EXPLORERS
    • HOMESCHOOL
    • CUSTOM PROGRAMS
    • SCOUTS
    • COMMUNITY PROGRAMS >
      • SPARK CREEKWATCHERS
      • FAMILY LEARNING/FAMILY FUN DAYS
      • HISTORY OF SPARK
    • TEACHER WORKSHOPS
    • SPECIAL EVENTS >
      • PHOTOGRAPHY SUMMIT
      • COILED BASKETRY WORKSHOP
      • SERVING UP THE SHORE
      • MARSH FEST
  • ABOUT US
    • STAFF/CONTACT US
    • RENTALS
    • EMPLOYMENT
    • INTERNSHIPS
    • KIDS TO CAMP SCHOLARSHIP
    • BLOG
    • 50 Years >
      • Donate for the 50th
      • History
    • MEMBER UNIVERSITIES
    • CAMPUS
  • DONATE NOW
    • WAYS TO SUPPORT US