First record of the rare deep-sea polychaete Rhamphobrachium (Rhamphobrachium) agassizii (Annelida: Onuphidae) in European waters

Andrés Arias*, Hannelore Paxton

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Rhamphobrachium (Rhamphobrachium) agassizii is reported from the Cantabrian Sea, Spain, from depths of 925-1207 m. This is its first record off the Iberian Peninsula and in European waters, representing its northernmost distribution in the North Atlantic Ocean to date. Previous reports of R. (R.) agassizii from the eastern and western North Atlantic demonstrate its apparent amphi-Atlantic distribution, which appears consistent with the distribution of the main Atlantic currents. It is a typical deep-water species with its deepest record at 2165 m from the Azores archipelago. The specimens were collected singly at two stations, attesting to the rarity of the species in contrast to its congener R. (Spinigerium) brevibrachiatum which was the most dominant polychaete species in a previous study.

Original languageEnglish
Pages (from-to)719-724
Number of pages6
JournalJournal of the Marine Biological Association of the United Kingdom
Issue number5
Publication statusPublished - Aug 2020


  • Atlantic Ocean
  • Avilés Canyon Systems
  • Bay of Biscay
  • Biodiversity
  • El Cachucho
  • Le Danois Bank
  • Tube-worm

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