"Throw your voice into the water."
The poster and the ambient-flyer awake interest and attention and give first contact points to the discussion of the overfishing-topic.

Solution

The idea for that poster i had some months ago. I think it suits the actual situation because there will be diskussions about a fishing bill ( hope its the right word^^) in the future.
It is shown, that it's possible for everybody to comment on the theme "overfishing" and support the WWF by raising his own voice.

The symbol of the speech bubble, which is simoultaneous a fish under water.
In a clear graphical way it shows that each one could take a direct influence on the future of the fisheries by supporting the WWF.