• Views from Penobscot Mountain summit.

    Acadia

    National Park Maine

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  • Temporary Road Closure

    A section of the Western Mtn Road in Southwest Harbor will be closed until 8/18 while park crews replace a culvert with a new fish-friendly open bottom culvert. For more information and a map visit our Getting Around Page. More »

  • 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.

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?

Cobblestone Bridge, faced with rounded cobblestones, has a stream running underneath.

The historic carriage road system at Acadia National Park features 17 stone-faced bridges spanning streams, waterfalls, cliffs, and roads. The design of each bridge, such as Cobblestone Bridge, is unique.