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Scientist hails 'incredible find' as mysterious tentacles wash up on Scottish beach

The rare deep-sea seven-arm octopus, Haliphron atlanticus, usually found below 500m, washed up on shore, highlighting unknowns about deep ocean species, experts said.

  • On Sunday, local residents at Forvie National Nature Reserve in Collieston found arms with rows of suckers, which experts identified as a seven-arm octopus, Haliphron atlanticus.
  • Scientists noted that these animals are deep-water dwellers found below 1,640ft, and Dr Lauren Smith, East Grampian Coastal Partnership, suggested disorientation or partial predation before remains washed ashore.
  • Physical inspection found only sections of arms after the next high tide, with reserve staff noting unusually large diameters and rows of big suckers unlike common shore octopus.
  • Reserve staff froze the remains soon to preserve them, and Dr Smith said samples will go to research laboratories, research groups, and potentially museums for analysis.
  • The find highlights how Haliphron atlanticus, with eight arms and males having a modified reproductive arm, lives hundreds of metres deep and shows the value of community reporting.
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BBC News broke the news in United Kingdom on Wednesday, December 3, 2025.
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