The term 'colorful eel' can be broken down into four crossword solutions: MORAY (5 letters), CONGER (6 letters), UNAGI (5 letters), and ELVER (5 letters). MORAY is a type of eel found in the Mediterranean Sea and tropical waters around the world. CONGER is a large, eel-like fish found in temperate and tropical waters. UNAGI is a freshwater eel found in Japan and other parts of East Asia. ELVER is a young eel found in rivers and estuaries in Europe and North America. All four of these eels are known for their colorful patterns and markings.