Thanks to the dastardly Pufferfish Drilling Corp, there was a large oil spill off the coast of Coral Island last year that plummeted the town's ranking and decimated the tourist economy. Luckily, the local scientist Ling has dedicated her life to saving the coral reefs and has figured out how you can help repair the damage from the oil spill. Here's how you can clean up the oil in Coral Island and save the local ecosystem.
How to clean oil in Coral Island
To clean up the oil, you'll need to complete dives where you clean up trash from the ocean floor. Shortly after you arrive on Coral Island, you will receive a message from Ling, who asks you to meet her by the Diving Pier. Once there, she will give you a diving suit and ask you to activate five beacons in the water. These beacons emit a special signal that activates the super coral Ling has created. This super coral is what will purge the area of oil and save the other coral in the reef.
Related: How to catch Bugs in Coral Island
To go diving, simply right-click on the pier's edge when you receive the prompt to go diving. Make sure to bring your scythe and snacks with you, as trash cleanup takes a lot of energy on both land and sea. As you are clearing trash, you might notice that a little item remains after clearing away the detritus. That's part of the key you'll need to activate a beacon.
How to activate the beacons in Coral Island
To activate a Coral Island beacon, right-click on the item left behind after you cleared away the trash. It will float away into one of the large stone contraptions you'll find in each zone of the ocean. This will cause the large stone contraption to unlock and emit a golden light that moves through the ocean floor. Follow it and remove any trash from its path until it disappears into the ground.
A beacon will emerge from the spot where the light disappeared. This beacon will shoot out a huge golden circle that will hit on everything in the surrounding area. The super coral around you will begin to glisten and bloom, and the dark spots of oil will fade away. Once all of the oil in the area has dissipated, it will count as free of oil, and you will be free to clean up the next zone.