The angler filmed himself catching the fish and uploaded the video to Instagram on Friday. The video shows the man filleting the cod to reveal its flesh, which is same shade of blue as the water.

A lingcod, location unknown; blue lingcod fillets. From red to white to orange to blue, fish flesh can land almost anywhere on the color spectrum. What's behind this huge variation? A lot of things — ...

From red to white to orange to blue, fish flesh can land almost anywhere on the color spectrum. What's behind this huge variation? A lot of things — from genetics to bile pigments. And parsing the ...