"The High-Tech Hunt For One Of The World’s Most Elusive Sharks" [1]
"OFF THE COAST OF CORSICA -- Nicolas Tomasi has never laid eyes on it. He has worked these waters for years without seeing one but has heard the tales from old-timers — of a patient predator, hiding under the sand off this French island’s shores, waiting for the right moment to strike.
The angel shark does not want to be found. But it can hide no longer.
On a hot August afternoon, Tomasi lowered a long, plastic tube attached to a weight over the edge of a dinghy and into the indigo water.
With the push of a few buttons, an electric pump began sucking up a small portion of the Mediterranean Sea — and with it, the ocean’s secrets.
The thin stream of siphoned water looked ordinary, but floating in it were microscopic particles laden with DNA from dozens of ocean animals. If an angel shark was below, this device could detect it."