The Irrawaddy dolphins in the Mekong River are increasing in number.
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Their elusive nature makes it difficult to study and track them.
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They only gently surface to breathe before diving back deep down.
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The dolphins were hunted for food during the violent Khmer Rouge times.
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The dolphins' numbers plummeted to below 80.
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Use of poison, dynamite, and large nets killed a lot of dolphins.
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The government has imposed regulations with the help of the WWF to protect the dolphins.
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While this is good news, their numbers are still too low to be safe from extinction.
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