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Sea cucumbers wash ashore by the thousands in a coastal Oregon town

Thousands of sea cucumbers washed ashore due to heavy surf and low tide, providing nutrients for local invertebrates, with such events occurring a few times yearly, experts said.

  • On Tuesday, Tiffany Boothe, assistant manager of the Seaside Aquarium, said thousands of skin-breathing sea cucumbers washed ashore across more than 2 miles of Seaside Beach, Oregon.
  • Heavy surf and low tide displaced the cucumbers onto the beach, as the species normally burrows into the sand along the low tideline habitat and farther offshore.
  • Each sea cucumber measures about a half-inch but can grow to about 6 inches, and Leptosynapta clarki ranges along the Pacific coast from northern California to the Gulf of Alaska.
  • Boothe said the stranded cucumbers cannot return to the water and will dry up and die, while their decomposing bodies will feed beach hoppers, beach fleas and other tideline invertebrates.
  • Such large groupings occur only a few times a year or sometimes once every few years, and Boothe expects they'll be gone by Wednesday or Thursday.
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Thousands of sea cucumbers washed up on the beach in the coastal town of Seaside, Oregon, due to a combination of strong waves and low tide.

·Lancaster, United States
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U.S. News broke the news in New York, United States on Tuesday, October 21, 2025.
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