The two fish in this coloring page are having a conversation. To bring out the conversation, the larger fish should be colored in a bright orange, with white stripes running down its body. The smaller fish should be colored a light blue with patches of white. Consider adding small details like spots or swirls to bring out the character in each fish. Use a darker orange for the larger fish's eyes and a bright blue for the smaller one's. For the background of the page, hues of blue, from light to dark, could help capture the mood of the conversation between the two fish. Finally, use a lighter blue for the rest of the page, creating a peaceful atmosphere for this whimsical picture.