Scarlet is among a group of endangered, rapidly dwindling Southern Resident killer whales that frequent the Pacific Northwest.

Scarlet is among a group of endangered, rapidly dwindling Southern Resident killer whales that frequent the Pacific Northwest.

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An endangered orca is sick and starving. Biologists are racing to find it

An ailing and emaciated orca named Scarlet could get food and antibiotics soon -- if biologists can find her before it's too late.