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Shark finning

Illegal harvesting of fins from live sharks

  • 26 min read
  • 7 chapters

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Through Marine ecosystem, Conservation movement and R/K selection theory

Shark finning increased since 1997 largely due to the increasing demand for shark fins for shark fin soup and traditional cures, particularly in China, Taiwan and Southeast Asia. Shark fin soup substitutes have lately also appeared on the market which do not require any shark fins.

The International Union for Conservation of Nature's Shark Specialist Group say that shark finning is widespread, and that "the rapidly expanding and largely unregulated shark fin trade represents one of the most serious threats to shark populations worldwide". Estimates of the global value of the shark fin trade range from US$540 million to US$1.2 billion (2007). Shark fins are among the most expensive seafood products, commonly retailing at US$400 per kg. In the United States, where finning is prohibited, some buyers regard the whale shark and the basking shark as trophy species, and pay $10,000 to $20,000 for a fin.

The regulated global catch of sharks reported to the Food and Agriculture Organization of the United Nations has been stable in recent years at an annual average just over 500,000 tonnes. Additional unregulated and unreported catches are thought to be common.

Shark finning has caused catastrophic harm to the marine ecosystem. Roughly 73 to 100 million sharks are killed each year by finning. A variety of shark species are threatened by shark finning, including the critically endangered scalloped hammerhead shark.

Process

Nearly every fin of a shark is targeted for harvest, as highlighted in the diagram. The primary and secondary dorsal fins are removed from the top of the shark, plus its pectoral fins, and, in a single cutting motion, the pelvic fin, anal fin, and bottom portion of its caudal fin, or tail.

Because the rest of the shark has little value relative to that of its fins, sharks are sometimes finned while fishing vessels are still at sea, and the finless and often still-living shark is thrown back into the sea to free space aboard the vessel. In legal contexts the use of the term "shark finning" can refer specifically to this practice of removing the fins from live sharks and discarding the carcass while still at sea. For these legal purposes the removal of fins on land during catch processing is not necessarily considered to be shark finning.

Shark species that are most commonly finned are:

  • Blacktip (Carcharhinus limbatus)
  • Blue (Prionace glauca) (a species of requiem shark)
  • Bull (Carcharhinus leucas) (a species of requiem shark)
  • Hammerhead (family Sphyrnidae)
  • Oceanic whitetip (Carcharhinus longimanus) (a species of requiem shark)
  • Porbeagle (Lamna nasus) (a species of mackerel shark)
  • Mako (Isurus oxyrinchus) (a species of mackerel shark)
  • Sandbar (Carcharhinus plumbeus) (a species of requiem shark)
  • Silky (Carcharhinus falciformis) (a species of requiem shark)
  • Spinner (Carcharhinus brevipinna (a species of requiem shark)
  • Thresher (family Alopiidae)
  • Tiger (Galeocerdo cuvier) (a species of requiem shark)
  • Great white shark (Carcharodon carcharias) (a species of mackerel shark)

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