Ok, I know I saw teh answer to this question before, but I couldn't find it again. The algae has appeared on the ocean. And it wont go away. I stopped fishing and nothing happened. HELP!

It's a puzzle that you have to solve, and it requires a certain level of technology and skilled villagers. You can find the exact answer in the detailed spoilers thread of the Guide.

Ohhhhh. Thanks Lady. Sometimes I dont think XD