Sharks are tapped into a secret ecosystem in the ocean’s Twilight Zone, and researchers are trying to tail them.
Only the faintest glimmers of sunlight can penetrate through to the ocean’s Twilight Zone—a hazy liminal space that marine travelers must pass through on their descent into total darkness. It’s the perfect place for sharks to lurk. But the specifics about where they go and what they do in the shadows of this limbo-like underworld still remain largely unknown to biologists.
After a set time period, maybe a couple months or so, a burn wire activates, detaching the tag and allowing it to pop up to the surface. The tag does not communicate with any satellites through that entire deployment. When it pops up at the end, it transmits a summary of the data on the tag to an orbiting satellite, and back to researchers in their office.Another palm-sized tag, calledThese tags are common and reliable, but they have their shortcomings.
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