Scalloped Hammerhead Shark (Sphyrna lewini)
Status | Species Description | Habitat | Distribution | Population Trends | Threats | Conservation Efforts | Regulatory Overview | Taxonomy | Key Documents | More Info
Scalloped Hammerhead Shark
(Sphyrna lewini)
Photo: NOAA
Distinct Population Segment (DPS) boundaries
Did You Know?
- They are the only sharks listed under the Endangered Species Act.
--Eastern Atlantic "DPS"
--Eastern Pacific "DPS"
ESA Threatened
--Central & Southwest Atlantic "DPS"
--Indo-West Pacific "DPS"
CITES Appendix II - throughout its range
Weight:
|
up to 335 pounds (152 kg) |
Length:
|
5-11 feet (1.5-3.5 m) |
Appearance:
|
flat, extended head or "cephalofoil" with indentations |
Lifespan:
|
15-30 years |
Diet:
|
crustaceans, teleosts, cephalopods and rays |
Behavior:
|
"viviparous" or give birth to live young, 12-31pups in a litter |
- targeted fisheries, shark fin trade
- bycatch
This species is highly desired for the shark fin trade because of its fin size and high fin ray count. They are caught in a variety of fisheries including artisanal and small-scale commercial fisheries, bottom longlines as well as offshore pelagic longlines, gillnets, etc. They are valuable in the international fin and are often used to make shark fin soup. Compilation of market prices from auction records indicates an average, wholesale, unprocessed fin market value of about $50-100 per pound.
In March 2013, at the CITES Conference of the Parties meeting in Bangkok, member nations, referred to as "Parties," voted in support of listing three species of hammerhead sharks (scalloped, smooth, and great) in CITES Appendix II—an action that means increased protection, but still allows legal and sustainable trade. This CITES listing is effective as of September 14, 2014. Export of their fins requires permits that ensure the products were legally acquired and that the Scientific Authority of the State of export has advised that such export is not detrimental to the survival of the species. On August 14, 2011, we received a petition from WildEarth Guardians and Friends of Animals to list the scalloped hammerhead shark (Sphyrna lewini) as threatened or endangered under the ESA throughout its entire range, or, as an alternative, to delineate the species into DPSs. On November 28, 2011, we published a notice that listing may be warranted. We published the proposed rule to list under the ESA and status review of the species in April 2013. In July 2014, we listed 4 DPSs under the ESA. Kingdom: AnimaliaPhylum: Chordata
Class: Chondrichthyes
Order: Carcharhiniformes
Family: Sphyrnidae
Genus: Sphyrna
Species: lewini (All documents are in PDF format.)
Title | Federal Register | Date |
---|---|---|
Notice of Critical Habitat Determination | 80 FR 71774 | 11/17/2015 |
Final Rule to List 4 DPSs under the ESA | 79 FR 38213 | 07/03/2014 |
Status Review Report (updated 2014) » 2013 Status Review Report |
03/2014 | |
Proposed Endangered and Threatened Listing Determinations for 4 Distinct Population Segments (DPSs) |
78 FR 20717 | 04/05/2013 |
Not Warranted for listing 12-month finding for 2 DPSs
|
78 FR 20717 | 04/05/2013 |
CITES Appendix II Proposal | 10/04/2012 | |
90-Day Finding on a Petition To List the Scalloped Hammerhead Shark as Threatened or Endangered and Initiation of Status Review | 76 FR 72891 | 11/28/2011 |
Petition to List Under the ESA | n/a | 08/2011 |
- CITES Implementation: U.S. Fish and Wildlife
- CITES Sharks and Manta Rays
- NOAA's role in CITES
- CITES conference takes decisive action to halt decline sharks, other species
- IUCN Red List
Updated: November 19, 2015