The term Yellowfin is a combination of two words, AHI (3 letters) and TUNA (4 letters). AHI is a Hawaiian word for yellowfin TUNA, which is a species of TUNA found in the Pacific Ocean. It is a popular fish for sushi and sashimi, and is also used for canning. The yellowfin TUNA is a large fish, typically weighing up to 200 pounds. It is known for its bright yellow fins and dark blue-green back. The yellowfin TUNA is an important commercial fish, and is widely sought after by recreational anglers.