Swimmers in Sydney have been urged to stay out of the water after three people were seriously wounded during a spate of shark attacks in New South Wales.

The attack was reported about 8 a.m. Tuesday near the town of Gualala. It’s the latest in a series of coastal shark attacks along Sonoma and Mendocino counties.

There is no greater threat to a Caribbean vacation than a shark. They are the shadow that looms over the sandy beaches and warm, alabaster-blue water. As apex predators in their environment, sharks have no reason to fear any other creatures in the water.

When a Monterey County woman died in a shark attack off Pacific Grove in late December, it was the 17th such fatality in 75 years off the coast of California.

Here is a rundown of the world’s deadliest sharks – and where you are most likely to encounter them. Each year, unsuspecting divers, surfers, and swimmers suffer shark bites – with some unfortunately not surviving to tell the tale. We’ve ranked the ...