- Golden Gate National Recreation Area (161)
- Point Reyes National Seashore (144)
- Glacier Bay National Park & Preserve (59)
- Muir Woods National Monument (39)
- Katmai National Park & Preserve (34)
- Kenai Fjords National Park (32)
- San Juan Island National Historical Park (32)
- Boston National Historical Park (31)
- Acadia National Park (30)
- Show More ...
- San Francisco Bay Area Inventory & Monitoring Network (43)
- Geologic Resources Division (25)
- Ocean Alaska Science and Learning Center (18)
- Inventory and Monitoring Division (16)
- National Center for Preservation Technology and Training (12)
- Southern California Research Learning Center (12)
- Harpers Ferry Center (6)
- National Heritage Areas Program (5)
- Southwest Alaska Inventory & Monitoring Network (5)
- Show More ...
Showing 1,087 results for marine invertebrates ...
- Type: Article
St. Clement’s Island Museum
- Type: Place

Discover the St Clement’s Island Museum where Maryland's founding story comes to life. Explore exhibits that highlight the rich history of the Piscataway People and early settlers. Stand on the historic island where the first English settlers landed in 1634, accessible by water taxi. Experience the beauty of the Potomac River and immerse yourself in the culture that shaped the Chesapeake Bay. Don’t miss the chance to learn and explore this unique site in St. Mary’s County.
Memorial Wall of Names
Assan through the Ages
- Type: Article

Assan Beach, the 2,500-yard shoreline stretching between Punta Adilok (Adelup Point) and Punta Assan (Asan Point), which the Marines in World War II called a "pair of devil horns," is a poignant symbol of the Guam's complex history, blending indigenous CHamoru traditions, wartime struggle, and ongoing military presence. In many ways, the story of Guam can be read through the story of Assan Beach. Talk a walk through history at Assan Beach.
- Type: Article

Since the early 2000s, ecologists who monitor rocky intertidal ecosystems each year have noted declines in a key intertidal seaweed commonly called rockweed. Rockweed is considered a foundational species, meaning that its presence is so important that without it the entire ecosystem would change radically. At Channel Islands National Park, marine ecologists are working with local scientists to understand the best methods to restore rockweed.
Frances Winifred Williams
St. Mary Falls Trail
Fonte Plateau
- Type: Place
U.S. Landing Monument
Liberators' Memorial
Asan Beach Unit
- Type: Place

In 1944, this seaside park, known locally as Assan Beach Park, was the site of fierce fighting. Assan Beach was the northern most of the two landing beaches used by American troops during the first days of the Battle of Guam. Today, the Asan Beach Unit is home to remains of the Imperial Japanese defenses and memorials to those who died during the battle.
3rd Marine Division Association Monument
Assan/Asan Beach
- Type: Place

During the Japanese occupation of Guam, CHamoru were forced to build defenses on the beach, including the pillboxes and bunkers that can still be seen today, in preparation for the American invasion. That invasion came on July 21, 1944, W Day for Guam. While a simultaneous attack took place five miles south at Hågat, the Third Marine Division landed on the 2,500-yard Assan Beach, marking the start of the Battle of Guam.
Deer Creek Beach
- Type: Place

Nestled in the Santa Monica Mountains, Deer Creek Beach covers 1,241 acres and boasts over two miles of pristine coastline. This newly-acquired federal land offers scenic views, diverse uplands, riparian areas, and coastal bluffs. As part of the Santa Monica Mountains National Recreation Area, it’s perfect for wildlife and nature lovers. Note: There are no amenities on-site, so plan for a rugged experience.
Fonte Plateau Unit
- Type: Place

Fonte Plateau Unit is the site of the final battle in Phase 1 of the Battle of Guam. While American forces secured the beachheads at Assan and Hågat by July 24, 1944, to secure and link the two beachheads, they needed to capture the well-fortified hills and mountains overlooking the water. This task was accomplished on July 29, 1944, when the 9th Marines captured Fonte Plateau. Today, the main feature at the Fonte Plateau Unit is the Imperial Japanese communications center.
Piti
- Type: Place

Above the village of Piti, sit three large Japanese Vickers-type Model 3 140mm coastal defense guns, the remains of hastily constructed fortifications build on the eve of the American invasion of Guam. As the Americans conquered more and more territory in the Pacific, the Japanese forced the CHamoru to build fortifications and install artillery and costal defense guns on Guam under brutal conditions.
Teaming Up for Science
- Type: Article

A new partnership began in October 2021 and supports science and stewardship activities that benefit both parks and their local communities. Over the next five years parks and their communities will collaborate to identify and address their scientific priorities. Projects in the first year will focus on water quality, marine biodiversity, and preservation of night skies.