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Scalloped Hammerhead Shark 5-Year Review


Endangered Species Act
Action Status
Affected Species


In 2019, NOAA Fisheries announced its intent to conduct a 5-year review for the four distinct population segments (DPSs) of the scalloped hammerhead shark (Sphyrna lewini):

  • Eastern Atlantic DPS
  • Eastern Pacific DPS
  • Central Southwest Atlantic DPS
  • Indo-West Pacific DPS

NOAA Fisheries is required by the Endangered Species Act to conduct 5-year reviews to ensure that listing classifications of species are accurate. The 5-year review must be based on the best scientific and commercial data available at the time of the review. We requested submission of any such information on these scalloped hammerhead shark DPSs, particularly information on the status, threats, and recovery of the DPSs that have become available since their listing on July 3, 2014.

We have now completed the 5-year review and conclude that no change to the listing status of the four DPSs is warranted at this time.

Last updated by Office of Protected Resources on 01/16/2024