Inky the Octopus needs your help in opening treasure chests full of wonders from the sea! To open each treasure chest, you’ll need to create a certain number of watermelons. No rush, this can happen over multiple rounds of Underwatermelon, so just keep playing and keep merging these fruits. Curious how many watermelons you still need? Just check the home screen, the watermelon counter is right above the treasure chest, so you can keep track.