Sailors playing heavy metal to scare killer whales may be putting a target on their backs by telling the orcas exactly where to find them

• Some sailors off the Iberian coast are turning to heavy metal to deter orcas from ramming into their boats.
• A marine mammal researcher told Insider that the strategy could backfire. 
• The music will also add to human-made ocean noise, which is already a major issue for marine animals.

Sailors using heavy metal music to deter orcas from ramming into their boats could find that the strategy backfires.