They are especially vulnerable because they swim slowly and close to the surface.
When the fish migrate, they swim into bays where the current is less strong and the water too shallow for predators.
In the spring they swim north from the Gulf of Mexico along the Gulf Stream, about 60 miles offshore, to the nutrient-rich waters of the Northeast and Canada.
"A study was released about three years ago that showed swimmers are 50 percent more likely to become ill if they swim within 50 yards of storm drain outfalls or river mouths -- and that's where the surf is best, " says Michelle Kremer, interim executive director of Surfrider Foundation.
They're just much faster. (Laughter.) And I know how to swim -- they just swim much better than I do.
Nearly 80% of those questioned who thought they would swim when abroad planned to swim in the sea.
Last weekend was a swim party they called a "sacrificial baptism": the last swim of the summer.
As they began to swim, the Suskis lost sight of the captain and first mate amid the burgeoning swells.
He said they could not swim on their backs because their disability prevented their backs from making the arch needed to swim.
And those visiting the nearby Mayan-themed nature parks Xcaret and Xel-Ha face similar rules, lest travellers leave behind an oily trail when they snorkel or swim with dolphins.
At the Ishasha border crossing, Melchisedek said they had to swim through a river to cross over into Uganda since it was impossible to use the guarded border.
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She talks to Olympians and to open-water champions like Lynne Cox to find out why they live to swim, why swimming is man's most sensuous sport (because skin is his largest sensory organ) and why it keeps your arteries elastic, your joints supple, is good for your heart as well as your brain, and offers more than a cursory help in the fight against ageing.
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When the coastguard rescue teams arrived, they found the four trying to swim the causeway were in difficulty - although they did finally make it.
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They had one more swim, then showered and put on the shorts and T-shirts.
The Mirror asks why they were allowed to swim after an earlier attack on a tourist.
And only a fifth of primary schools did not ensure that all pupils could swim before they left.
Without their fins, sharks cannot swim and they sink to the ocean floor, where they're picked at by other fish and left to die.
They could raft or swim across a narrow marine canal.
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"I choose what I eat or whether I smoke, what people have told us is they want help to swim with the tide rather than against the current to make the healthy choice the easy one, " he said.
For example, based on what was popular amongst their readers, they decided to commission Wild Swim by Kate Rew and Dominick Tyler.
"The last thing I want to do is for them to get to the end of the summer and feel like all they've done is swim, " he said.
They include examples that fly, swim and run, and range in weight from a couple of grams to hundreds of tonnes.
No one should be allowed to swim alone, even if they are a strong swimmer.
The AAP also supports teaching children how to swim, whether or not they have a pool at home.
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"In many villages they began to realize that a simple swim in the river caused rashes, " said Ianukula Kaiabisuia, coordinator of Xingu Park.
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