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Biologists Discover Surprisingly Cute Deep-Sea Fish Species Off the Coast of California

Three new deep-sea snailfish species discovered highlight the vast unknown biodiversity in ocean depths, with over 400 species known globally, researchers said.

  • In 2019, researchers including MBARI scientists discovered three new deep-sea snailfish species off the coast of California using the ROV Doc Ricketts at about 10,722 feet depth.
  • The discovery resulted from a coordinated effort among experts from MBARI, SUNY Geneseo, University of Montana, and University of Hawaiʻi at Mānoa studying biodiversity in the deep ocean environment.
  • The new species are the pink bumpy snailfish with large eyes and bumpy skin, the black dark snailfish , and the slender sleek snailfish .
  • The adult female bumpy snailfish was 9.2 cm long and studied via CT scans that detailed its skeleton, complementing video footage captured on the abyssal seafloor.
  • This finding highlights the vast unknown biodiversity of the deep sea and underscores the urgency of documenting deep-sea species amid environmental threats like climate change and mining.
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IFLScience broke the news in on Monday, September 8, 2025.
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