Amur Kaluga Caviar Arrives chilled, never frozen. The Kaluga Hybrid caviar has large-sized eggs, a light brown/golden color, and creamy/buttery flavor. Our Kaluga caviar mimics the Beluga in size of egg, color and taste, and is derived from Huso Dauricus and Acipenser Schrenckii sturgeon species. With the largest grain and most delicate in flavor of sturgeon eggs, Kaluga Selection Caviar has a nutty flavor with buttery overtones and its color varies from medium to dark brown with a clear glossy finish.