Google is reinforcing its underwater internet cables to protect them against shark attacks.
The fibre optic lines under the Pacific are being wrapped in a super-hard material similar to Kevlar, which is used to make bullet-proof vests and military armour.
Dan Belcher, a product manager for the company, told the Google Cloud Roadshow the internet giant goes to great lengths to protect its infrastructure, Network World reported.
Sharks appear to have developed an inexplicable taste for underwater cables dating back to the 1980s.
A New York Times report in 1987 said the then new fibre optic cables linking the US, Europe and Japan were being gnawed by sharks, causing phone and computer failures around the world.
In 1985, shark teeth were reportedly found embedded in an experimental line in the sea off the Canary Islands.
One theory is that curious sharks are attracted to the electric and magnetic fields around the cables, which are far stronger than with older copper lines, and mistake it for distressed fish.