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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.
Sometimes tobiko is colored to change its appearance, other natural ingredients are used to accomplish the change, such as squid ink to make it black, yuzu to make it pale orange (almost yellow), or even wasabi to make it green and spicy. Sometimes a serving of tobiko contains several pieces, each having a different color.
Frequently, masago, capelin or smelt roe is substituted for tobiko, due to its similar appearance and flavor. The tiny size of the individual eggs is apparent to the experienced diner, however.
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.
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- Food Republic http://www.foodrepublic.com/2013/04/19/what-tobiko-and-whats-different-colors. Retrieved 18 October 2014. Missing or empty
- Self Nutrition Data