• 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.

  • Bubble Pond Carriage Road closure

    Bubble Pond Carriage Road will be closed to all traffic Monday 9/15- Wednesday 9/17 from the parking lot to Triad-Day Mountain Bridge. 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?

A man boards the Island Explorer bus.

Since 1999, propane-powered Island Explorer buses have carried more than two million passengers in Acadia National Park, eliminating more than 685,000 automobile trips and preventing 6,444 tons of greenhouse gases. The fare-free buses are supported by your entrance fees. More...