A male crowntail betta is a visually striking variety of Betta splendens known for its crown-like fins, which have elongated rays with minimal webbing. Males are territorial, aggressive toward other males, and display vibrant colors ranging from deep blues and reds to iridescent purples and greens. They are an active, intelligent, and relatively hardy fish when provided with a proper environment, including a warm, stable aquarium with a gentle filter and a protein-rich diet.