Design an image featuring a person with a big, brightly colored fish, but make the following changes: 1. Change the fish to a vibrant green and blue color scheme. 2. Alter the setting to a serene lake instead of an ocean. 3. Replace the person's clothing with a casual t-shirt and jeans. 4. Modify the hat to a wide-brimmed straw hat for a summery feel. 5. Remove any visible branding or logos from the clothing and hat. Ensure the overall mood is cheerful and relaxed.