Science: Abstracts Fiber-Optic Feeding Frenzy

Just when you thought it was safe to go back in the water, marine biologists have charted some capricious changes in the feeding habits of sharks. In the past two years, sharks have repeatedly attacked the new 1-in. fiber-optic telephone cable off the Canary Islands. The marauding is expensive: an average cable repair is laborious and costs at least $150,000.

What is it about fiber-optic cable? Marine biologists accompanying the repair teams have tried to find out. Along the way, they have learned that sharks generally do not feed below 3,000 ft., thus making it unnecessary to protect cable below that...