As much as 40 US gallons of highly radioactive waste water from a crippled Fukushima nuclear plant has leaked to the Pacific, including highly harmful strontium, linked with bone cancers, that has spread to the open ocean. The water leaked to the sea is believed to contain 26 billion becquerels of radioactive materials, according to plant owner, TEPCO. The Fukushima nuclear disaster is responsible for the world's worst nuclear sea contamination. Ocean contamination has been measured at 100,000 becquerels per cubic liter. Al Jazeera looked into the effect on fish and fishermen.