carp

The lack of clean water, sanctions and ISIS have all contributed to depleting the supply of fish that is salted, fire-roasted and shared by Iraqis of all sects and political persuasions.

Carp are a major food source, but they've been plagued by viruses. Scientists now say they have a simple solution. And along the way, they hit on an ancient commonality between fish and people.

Christmas carp is a holiday mainstay in many central European nations. Traditionally, it swims in the family tub for a day or two, sometimes becoming a sort of pet before it ends up on the plate.