"A variety of roe types are used in Japanese cuisine, including the following which are used raw in sushi:
Ikura (イクラ) - Salmon roe. Large reddish-orange individual spheres. Since salmon eggs are also used as bait, first-time sushi eaters who have experienced fishing may be taken aback when served ikura. It is a loan word from the Russian, ""ikra"" (caviar)."