The orcas will wait all day for a fisher to accumulate a catch of halibut, and then deftly rob them blind. They will relentlessly stalk individual fishing boats, sometimes forcing them back into port.
Most chilling of all, this is new: After decades of relatively peaceful coexistence with cod and halibut fishers off the coast of Alaska, the region’s orcas appear to be turning on them in greater numbers.
“We’ve been chased out of the Bering Sea,” said Paul Clampitt, Washington State-based co-owner of the F/V Augustine.
Like many boats, the Augustine has tried electronic noisemakers to ward off the animals, but the orcas simply got used to them.
“It became a dinner bell,” said Clampitt.
John McHenry, owner of the F/V Seymour, described orca pods near Alaska’s Aleutian Islands as being like a “motorcycle gang.” 
“You’d see two of them show up, and that’s the end of the trip. Pretty soon all 40 of them …
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