Tobiko is the Japanese word for the flying fish roe. It is most widely known for its use in creating certain types of sushi. The eggs are small, ranging from 0.5 to 0.8 mm. For comparison, tobiko is larger than masago (capelin roe), but smaller than ikura (salmon roe). Natural tobiko has a red-orange color, a mild smoky or salty taste, and a crunchy texture.
The raw roe is very nutritious, due to its high vitamin content, high protein content, and large ratio of omega-3 to omega-6 fatty acids. Although it contains a large amount of cholesterol, the amount of roe consumed in typical servings, about a tablespoon, does not create an issue in a healthy diet since it amounts to approximately seventeen percent of the recommended daily value for cholesterol.