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Galapagos Islands Have the Largest Shark Biomass in the World

A group of hammerhead sharks swims over the sandy seafloor populated with garden eels at Darwin Island. These sharks are known for their ability to make sudden and sharp turns as the unique wide-set placement of their eyes allows them a vertical 360-degree view, which is ideal for stalking their prey. (Enric Sala/ National Geographic for National Geographic Pristine Seas)

In a study published this week, scientists from the National Geographic Society and Charles Darwin Research Station found that Darwin and Wolf in the Galapagos Islands is home to the world's largest shark biomass (the total mass of sharks in a given area) in the world.

This is especially welcome news as sharks continue to be hunted for the shark fin trade — with an estimated 73 million sharks killed annually. According to lead author Pelayo Salinas de Leon, "[T]he islands of Darwin and Wolf are jewels in the crown of the Galapagos,” due to the abundance of these top predators indicating a healthy marine ecosystem. 

However, the two-year study funded by Helmsley Charitable Trust also found that reef fish in the area have been severely reduced due to overfishing. To protect its marine life, the Ecuadorian government created a marine sanctuary at Darwin and Wolf in March.

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Illegal Fishermen Arrested in Galapagos Marine Reserve

Illegal fishing vessel Maria Tatiana IV (GNPS)

Late last week, a commercial fishing vessel and its six fiberglass boats were caught illegally fishing within the Galapagos Marine Reserve with a catch of 160 sharks and other fish.

The Maria Tatiana IV, a fishing vessel from continental Ecuador entered the Galapagos Marine Reserve’s boundaries late Thursday night. Park rangers in the Galapagos National Park control center monitored its trajectory using technology provided by WildAid while patrol vessels sped towards the fishing vessel, having been alerted to this suspicious activity.

After a full day and night chasing the poachers at sea, the Galapagos park rangers and Ecuadorian Navy arrested 21 crew members and seized all seven boats, the long lines and the bounty of illegally caught species. These included 81 sharks—36 silky sharks, 24 blue sharks, 14 pelagic thresher sharks, six bigeye thresher sharks and one great white shark.

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