The design for the online fish store website uses a vibrant color palette of deep sea blue (#0069CB), light cream (#F7FFE3), and white (#FFFFFF) to enhance the online shopping experience. The website features creatively styled fish images in an interactive manner, increasing user engagement. Strategic calls to action ensure easy navigation and encourage purchases. The footer is uniquely designed to mimic a real aquarium, adding a dynamic and thematic finish to the page, which not only boosts aesthetic appeal but also reinforces the aquatic theme throughout the user's journey.