In the battle against an exotic seaweed, biologists are employing a rather unusual solution: underwater vacuum cleaners. The cleaners—called Super Suckers—suck up tons of gorilla ogo, invasive algae that are killing coral reefs, smothering sea grass beds, and fouling beaches in Hawaii. Since 2006 the original Super Sucker, a barge-mounted device, has been operating in Kaneohe Bay, on the island of Oahu, where the seaweed invasion is particularly severe.
