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Stinging Tentacles Offer Hint of Oceans’ Decline
Blue patrol boats crisscross the swimming areas of beaches here with their
huge nets skimming the water’s surface. The yellow flags that urge caution and
the red flags that prohibit swimming because of risky currents are sometimes
topped now with blue ones warning of a new danger: swarms of jellyfish.
In a period of hours during a day a couple of weeks ago, 300 people on
Barcelona’s bustling beaches were treated for stings, and 11 were taken to
hospitals.
From Spain to New York, to Australia, Japan and Hawaii, jellyfish are becoming
more numerous and more widespread, and they are showing up in places where they
have rarely been seen before, scientists say. The faceless marauders are
stinging children blithely bathing on summer vacations, forcing beaches to close
and clogging fishing nets.
But while jellyfish invasions are a nuisance to tourists and a hardship to
fishermen, for scientists they are a source of more ...
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