Fish egg sac

A fish egg sac is an organ in female fishes that contains her roe (eggs). While it is most common to open the sac and serve the roe individually, as in caviar or ikura, there are some cuisines that prepare the sac and serve entire. Notable examples include Norwegian mølje, made from skrei (winter cod); southern Brazil, where mullet roe sacs are deep-fried or pan-seared, andJapanese sujiko, made with salmon roe.