There should only be one success metric in business and thatʼs happiness A Yellow Goldfish is anytime a business does a little extra to contribute to the happiness of its customers, employees, or society. Based on 300 case studies, Yellow Goldfish by Stan Phelps CSP and Rosario Cirillo Louwman CCXP, provides a nine-part framework for happiness-driven growth, productivity, and prosperity in business.