Blockchain technology is rapidly evolving beyond Bitcoin and being applied to different industries. One way it can help clean up the fishing industry is by bringing some much needed supply-chain transparency. The WWF is set to test out blockchain technology by keeping track of every step of the tuna-fishing process, from the moment it is caught to the moment it reaches the stores. By doing this, it will be easier to answer those tricky questions about whether or not tuna was caught sustainably, ethically, or legally.