Babylonia areolata, commonly known as the spotted babylon, areola whelk, or sweet snail, is a species of sea snail belonging to the family Babyloniidae. It is native to the warm, shallow marine waters of the Indo-Pacific region, spanning from the South China Sea down through the Gulf of Thailand and the Indonesian archipelago. The genus name Babylonia draws an analogy between the spiraling, stepped structure of the shell and the ancient, multi-tiered Tower of Babel, while the species epithet areolata means "with small spaces or spots," directly describing the tessellated patterning on its exterior. Historically a wild-foraged coastal resource, Babylonia areolata has become one of the most commercially successful and highly valued gastropod species in modern Asian aquaculture, particularly across China, Thailand, and Vietnam.

The organism is a carnivorous and scavenging gastropod characterized by a smooth, heavy, and ovate-conical shell that can grow up to 6 to 9 centimeters in length. The shell's background color ranges from white to ivory, dramatically marked with prominent, regularly spaced rectangular spots of a yellowish-brown or dark chocolate hue arranged in spiral rows. The animal possesses a large, muscular foot used for crawling over muddy or sandy seafloors and a protective, horny operculum (trapdoor) that seals the shell opening when threatened. Unlike many herbivorous marine snails, the spotted babylon relies on a keen sense of chemoreception via its siphon to locate carrion or small invertebrates. In commercial farming, it adapts exceptionally well to cement tanks or sandy-bottomed coastal ponds, where it is fed a diet of low-value bycatch fish.

Babylonia areolata is a highly prized culinary delicacy across East and Southeast Asia, celebrated for its exceptionally firm, crunchy texture and a naturally sweet, clean marine flavor. In Chinese gastronomy, particularly in Cantonese and Chaoshan traditions, it is frequently boiled or steamed whole and served alongside a spicy soy dipping sauce, or quickly stir-fried with scallions, ginger, and a rich black bean sauce. In Thai cuisine, where it is known as hoi waan (literally "sweet snail"), it is famously grilled over charcoal and eaten with a fiery, lime-heavy seafood dipping sauce. Because the meat remains resilient and crisp even when subjected to high heat, it is an ideal candidate for hot pots and intense stir-fries.

Nutritionally, the sweet snail is a nutrient-dense, low-fat source of high-quality animal protein, making it a popular choice for health-conscious consumers. It provides a substantial array of essential minerals, including selenium, zinc, iron, and magnesium, alongside a robust profile of B-complex vitamins, particularly B12. Its lipid matrix, while minimal, is rich in omega-3 polyunsaturated fatty acids and valuable structural phospholipids that support cellular health. In the framework of gastronomic ethnobiology, the successful shift of Babylonia areolata from an over-exploited wild fishery to a controlled aquaculture staple highlights its role in sustainable coastal economies and the preservation of traditional seafood foodways.