THE WHITE FISH OF BLUE?
The distinction between white fish and blue fish is determined by the amount of fat your meat has. While blue fish provide a fat intake of more than 5% and can reach up to 15%, white fish offer a fat intake of less than 2%.
The key is in the queue:
The blue fish have the arrow-shaped tail.
In white fish, the edge of the tail is straight.
Common blue fish in Spain:
Common white fish in Spain: