As we continue to deplete the ocean of wild fish in our never-ending quest to feed ourselves, we’ve turned to fish farming as a possible solution. But aquaculture hasn't always been the cleanest industry around. The Blue Economy Challenge, sponsored by Australian Aid, the World Wildlife Fund, and several others, aims to nurture new ideas in sustainable aquaculture development that help those already working in the industry improve their lives and make better products.

While seaweed may not sound sexy, global demand for it in food, cosmetics, medicine, and toothpaste has helped female seaweed farmers in Zanzibar earn a decent living for their families for decades.

Now that harvest is being threatened by warming waters, degrading the quality of the