That's news to me

Zoologists have developed a plan to save the Yangtze River dolphin, probably the world's most endangered mammal, from extinction.
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The most recent surveys found only 17 living individuals.

• ox·bow (ŏks'bō') – (here) A U-shaped bend in a river.
• by-catch (bī'kăch', -kĕch') – The portion of a fishing catch that is discarded as unwanted or commercially unusable.