While it cannot be cooked, using a knife on a leaping sturgeon will produce caviar, providing 15 Cooking experience, as well as sometimes producing fish offcuts. This is the only leaping fish to give caviar (which is sturgeon roe). Caviar is used in Herblore to make barbarian mixes. It is wise when gutting a full inventory's worth of sturgeon to leave one open space in the inventory, as unlike roe received from other leaping fish, caviar is received from every sturgeon gutted. This means having a full inventory will stop the player from gaining fish offcuts alongside the caviar.