Some fish species are oviparous, meaning that the fish fry (babies) are born from eggs that are excreted from the female fish's body prior to hatching. Fish eggs are occasionally used by humans for food and fish bait.
Those who are unsure of whether fish lay eggs may want to seek answers at a sushi restaurant. Fish eggs are commonly used for sushi dishes, including as a topping for fancy sushi rolls or as sole ingredients in a simple piece of sushi. In this context, the fish eggs can be known as masago, ikuro or tobiko. Other culinary traditions include the use of fish eggs, including the black caviar of Russian cuisine. Fish eggs can also be called roe.