The term 'COLORFUL FOOD FISH' can be broken down into three crossword solutions: OPAH (4 letters), Opahs (5 letters), and Rainbowtro (9 letters). OPAH is a large, colorful fish found in tropical and subtropical waters of the Pacific and Indian Oceans. It is also known as moonfish due to its round shape. Opahs are a species of ray-finned fish related to the OPAH. They are found in the same areas as the OPAH and have similar coloring. Rainbowtro is a type of fish found in the Indo-Pacific region. It is known for its bright colors and is a popular food fish.