The Rainbow Fish is a popular children's book character that is known for its colorful scales and generous spirit. The term 'Rainbow Fish' can also refer to several species of real-life fish, including the guppy (5 letters), TROUT (5 letters), and MAORI (5 letters). Guppies (7 letters) are a type of small freshwater fish that are often brightly colored and have long fins. TROUT are a type of freshwater fish that are usually found in cold-water streams and lakes. MAORI are a type of fish native to New Zealand that are known for their bright colors and intricate patterns.