Yellow Fin Grouper vary from greenish olive or bright red with long rows of darker black blotches over entire fish. The outer one third of pectoral fins are bright yellow with the lower parts of large grouper, small bright red spots. Mostly found offshore and on South Florida reefs. Averages around 20 pounds, but can be found upwards to 30 pounds. Yellowfin Grouper feed on fish and squid.