• Views from Penobscot Mountain summit.

    Acadia

    National Park Maine

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  • Trail Closure: Gorge Path weekdays, 7 am - 4 pm

    The section of the Gorge Path between the Hemlock Path intersection and the A. Murray Young Trail intersection is closed until rehabilitation work is completed. The closure will be in effect Mondays through Fridays only, from 7 am to 4 pm.

  • Construction updates

    Construction is continuing throughout the park. More information can be found on our Temporary Closures page. More »

Field Guide to Marine Invertebrates

This field guide will help you identify some of the marine invertebrates in the intertidal zone along the coast of Mount Desert Island. Explore the categories below to see descriptions and photos of some of the species you might find.

The field guide was developed by Sarah Hall and Joseph Stachelek, under the guidance of Professor Susan Brawley, for their senior capstone project at the University of Maine.

To learn how to have a safe, fun experience in the intertidal zone, read about tidepooling.

Did You Know?

CCC members take a break from their work to admire the view along the ocean.

The Civilian Conservation Corps performed important work in Acadia National Park, including clearing brush, setting stones, and constructing Seawall Campground. Today park headquarters is located in the former CCC camp.