@ramz.olibab: In Japan, the dark, blood-rich muscle found along a fish's spine or lateral line is known as chiai (血合い). Highly active fish like tuna have higher concentrations of oxygen-carrying myoglobin in these muscles, making this dark meat a nutritional powerhouse packed with protein, iron, and beneficial antioxidants #Chiai #DarkMeat #FishBloodline #TunaDarkMeat #SustainableSeafood