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Sharks Thrive Inside an Underwater Volcano

Aussie Spirit by Aussie Spirit
August 10, 2020
in NEWS
2 min read
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Sharks Thrive Inside an Underwater Volcano
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When the camera plunged into the roiling orange waters of one of the most active submarine volcanoes in the world, scientists expected to see plenty of activity; hordes of sharks living in the fiery crater were not supposed to be seen.

Reef sharks, hammerheads, and scalloped hammerheads all swam up to the lens, unbound by the fact that a short time before an eruption had taken place.

The discovery was made in 2015 by National Geographic Grant Dr Brennan Phillips at the Solomon Islands volcano Kavachi.

How, when and how many sharks are there is one of the greatest underwater mysteries of the planet and is the subject of Sharkcano, a new National Geographic documentary.

Marine ecologist Michael Heithaus, of Florida International University’s Department of Biological Sciences, has dedicated the last few years of his career to asking why the top predators are drawn to volcanoes.

Professor Heithaus, who has been researching sharks for the past 25 years, told 9News.com.au that he had been blown away by the discovery of Dr Phillips, which occurred by happenstance.

“I thought it sounded like a sci-fi movie. It’s an amazing find,” Professor Heithaus said.
“It just demonstrates how adaptable sharks are.
“Extreme environments are something they can clearly handle; whether it’s a volcano or surviving thousands of metres underwater.
“It’s really not yet known why they are there. It could be something to do with reproduction, or who knows what else is living in there… maybe they’re just sniffing out a meal.”
Sharks have on their snout a series of pores called the Lorenzini ampullae, which Professor Heithaus claims can sense changes in the earth’s magnetic field – enabling them to swim to safety before an eruption occurs.
This mysterious “sixth sense” may also help them hunt and sniff out other volcanic islands.
“It looked like the sharks in the volcano were used to dealing with eruptions,” he said.
“You would think it’s dangerous but studies have shown us they can detect approaching hurricanes and cyclones, so they may be able to detect when something bad is about to happen and move out of the way.”
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