"While killer whales are known to linger near the mouth of that salmon-rich river, which flows into Bristol Bay, there had never before been a documented case in Alaska of killer whales spending prolonged periods in a river's fresh water...The adults, one of them in the late stages of pregnancy, were found dead in the river last weekend. Initial results from necropsies have failed to pinpoint a specific cause of death."
Inform Science brings us the story from Rueters news service. Three whales, one pregnant swam thirty miles upriver! All three died.
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