The tiny crustaceans known as krill are a staple in the Antarctic food chain, providing everything from fish and whales to seals and penguins.
But now they're in danger of extinction thanks to overharvesting, the Travel Channel reports.
They're used to make omega-3 oils, and they're also used as a filler in animal feed.
"Just as humans once hunted whales almost to extinction, krill are being harvested extensively in the Antarctic Southern Ocean, so much so that the species is at risk," says Philippe Cousteau, who with his brother, Ashlan, appeared on the Travel Channel's World Oceans Day last week.
"They could face a loss of another 40% because of the impacts of climate change."
The Cousteaus say consumers should steer clear of krill-based products, which sequester more CO2 than the Amazon, and instead use algae oil as an alternative.
"The solution Ashlan and Philippe suggest is a remarkable example of a broad solution that addresses many climate-related problems," says the Travel Channel.
"Krill are tiny, shrimp-like crustaceans that serve as a primary food source for many marine animals, including fish, whales, seals, and penguins in the Antarctic Southern Ocean."
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