Warming oceans are pushing fish toward the poles in search of cooler waters, according to a study that raises new concerns that climate change is robbing the tropics of a primary source of income and nutrition.

Meanwhile, in higher latitudes, data show that trawlers are hauling more warm-water fish out of the ocean — a phenomenon that will change what shows up on menus at locavore restaurants from Cape Town to Tokyo.

“There’ll be changes in the kinds of fish that are available to people who would like to follow that kind of (eating local) strategy,” Michael Fogarty, a fisheries biologist with the National Oceanic and Atmospheric Administration’s Northeast Fisheries Science Center, told NBC News.