Question: what is the difference between a yellowfin and bluefin tuna?
Answer: The key differences between bluefin and yellowfin tuna include: 1) Size - Bluefin tuna can reach sizes of over 1,000 lbs. while yellowfin tuna rarely reach over 500 lbs; 2) Color - Yellowfin Tuna have a distinct yellow lateral line from their head to their tail above the pectoral fins.