This Tweak & Toss "adventure seed" is a little different than most in that it is more of a background adventure that can be run concurrently with another adventure, or as a side-quest that would be of particular interest to a Druid PC. The design is deliberately vague in several areas to make it easy to integrate with your current campaign. Perfect for when the party goes "left" when you expected them to go "right", any GM/DM/Judge can easily drop this into the current campaign.
The idea behind this Tweak & Toss is that there is an impending ecological disaster due to a small group of fishermen attempting to raise a rather invasive species of clam for profit. Nobody is aware of the fate that will befall this region if the fishermen's plans come to fruition.