Synanceia is a genus of fish of the family Synanceiidae, the stonefishes, whose members are venomous, dangerous, and even fatal to humans. It is one of the most venomous fish known. They are found in the coastal regions of the Indo-Pacific.

Despite their fearsome reputation, Synanceia are edible to humans if prepared properly as the protein-based venom quickly breaks down if heated, while raw stonefish served as part of sushi is rendered harmless simply by removing the dorsal fins, which are the main source of venom. The fish are considered a delicacy in many parts of Asia, including south Japan, south Fujian and Guangdong in China, and Hong Kong. In the Hokkien-speaking area, they are considered delicacies and good for health. The meat of Synanceia is white, dense and sweet, and the skin is also edible. They are usually cooked with ginger into a clear soup, and sometimes served raw as sushi or sashimi.