• Views from Penobscot Mountain summit.

    Acadia

    National Park Maine

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  • Trail Closures: Peregrine Falcon Nesting

    Precipice Cliff, Valley Cove, and Jordan Cliff areas are closed to all public entry until further notice for peregrine falcon nesting season. More »

  • Cultural Connections programs rescheduled for 7/16/2014 due to weather

    Ash Log Pounding demo will take place today 11 am-3 pm at the Abbe Museum downtown (26 Mount Desert St, Bar Harbor). The Burnurwurbskek Singers have been rescheduled to perform on Cadillac Summit next Wed, July 23 at 11 am.

Field Guide to Marine Invertebrates - Echinoderms

Northern Sea Star
Asterias rubens
Asterias rubens ("northern sea star") can be purple, reddish brown, orange, or yellow. It commonly feeds on blue mussels, restricting their lower range on the shore.
 
Green sea urchin in habitat
Strongylocentrotus droebachiensis
Strongylocentrotus droebachiensis ("green sea urchin") is found in the lower intertidal zone in tide pools and is abundant in the subtidal zone. In a natural cycle, large groups of urchins eat their way through kelp beds to create “urchin barrens” where seaweeds are scarce; then, the urchin population decreases because of lack of food, allowing the kelp beds to recover. Recent overfishing of urchins on the Maine coast caused notable increases in kelp populations near the shore.
 
Photos by Sarah Hall.

Did You Know?

From atop Cadillac Mountain, the sun is just starting to rise over the Porcupine Islands.

Cadillac Mountain in Acadia National Park is the tallest mountain along the eastern coast of the United States. During certain times of the year, it is the first place in the U.S. to see sunrise.