The term 'brilliantly colored' can be described by the crossword solutions of opahs (5 letters), MACAW (5 letters), NEWT (4 letters), OPAH (4 letters), NEON (4 letters), MACAWS (6 letters), WRASSE (6 letters), and VIVID (5 letters). Opahs are large, flat fish that are found in tropical and subtropical waters. MACAWS are large, colorful parrots native to Central and South America. Newts are small aquatic salamanders found in North America, Europe, and Asia. OPAH is another name for a moonfish, which is a large, round fish with a bright red color. NEON is a chemical element that emits a bright orange-red light when electricity passes through it. MACAWS are known for their brightly colored feathers, which come in a variety of shades. WRASSE are a type of fish found in shallow tropical and subtropical waters, and they often have VIVID colors. Finally, VIVID is an adjective used to describe something that is bright and intense in color.