Which is bigger yellow fin or bluegill?

Yellowfin tuna are significantly larger than bluegill. Yellowfin tuna can weigh between 100 to 400 pounds and reach lengths of up to 7 feet, while bluegill typically weigh around 1 to 4 pounds and measure about 6 to 12 inches in length. Thus, yellowfin tuna are much bigger than bluegill both in weight and size.