g'day sam, blue fin and yellow are quite similar in taste,they also look similar but generally yellow fin is a darker red in colour and blue fin a little less due to higher fat and oil content.albacore(chicken of the sea) has a higher body core temprature to the last two tuna and deteriorates three times faster than normal fish and if not handled well thru the process after caputure the fish creates a chemical that when you eat the fish it leaves a metalic taste in your mouth and can also make you unwell for 24 hours(histamine).the best way to handle tuna is to brain spike them straight awaythen bleed them,all fish shold be store in an ice slurry of salt water and ice.. TIGHT LINES