Year after year, the ocean's most successful killer is not the great white shark. It's not the deadly jellyfish. Not even monster waves or hurricane-force winds. Your worst ocean nightmare during a day at the beach is more likely to be a rip current, experts say.
Every year more than 100 beachgoers drown in these strong rushes of water that pull swimmers away from the shore. And that's just in the United States. Nearly half of all rescues made by lifeguards at ocean beaches are related to rip currents, according to the United States Lifesaving Association. Sharks typically kill about 6 people a year globally.
[via: http://www.livescience.com]
