What is masago what is?

Masago is the roe (fish eggs) of the capelin fish, which is a small, oily fish found in the North Atlantic and Arctic oceans. It is commonly used as a topping in Japanese cuisine, particularly in sushi rolls such as California rolls and spicy tuna rolls. Masago has a crunchy texture and a mild, slightly sweet flavor. It is often dyed different colors, such as orange or black, to enhance its visual appeal. Masago is high in protein, vitamins, and minerals, making it a nutritious addition to dishes.