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Carriage roads within the park are now open for all users.
April 18, 2012: All carriage roads in the park are now open to walkers, bicyclists, and horses. More »
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Trail Closures
The Precipice Trail, Orange & Black Path (formerly the East Face Trail), and Valley Cove Trail are closed to protect nesting peregrine falcons. Call 207-288-3338, ext. 0, for more information. More »
Field Guide to Marine Invertebrates - Other
Halichondria panicea ("crumb-of-bread sponge") is green due to symbiotic green algae called zoochlorellae that live within the sponge. When the zoochlorellae are absent, the sea sponge is orange. This sponge is a filter feeder found in subtidal and lower intertidal zones. 
Urticina felina ("northern red anemone") is sessile (permanently attached to the substrate). This sea anemone uses its tentacles to gather nearby food particles. It is common in the subtidal zone, but can be found in cracks and tidepools in the lower intertidal zone of rocky shores.
Photo by Sarah Hall.
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Did You Know?
Acadia National Park's carriage road system, built by John D. Rockefeller Jr., has been called “the finest example of broken stone roads designed for horse-drawn vehicles still extant in America.” Today, you can hike or bike 45 miles of these scenic carriage roads in the park.