Study: Hawaii's pygmy killer whales stay close

HONOLULU (AP) -- A new study of pygmy killer whales - one of the least understood marine mammal species - shows that those living off Hawaii tend to stay close to the islands and don't swim out to the open ocean. There are very few of the whales, probably less than 200 individuals, in this distinct pygmy killer whale population off the islands. The population's limited number make it more vulnerable than other whale populations to potentially harmful human behavior, including fishing an...

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