Synanceia is a genus of ray-finned fish belonging to the subfamily Synanceiinae, commonly known as the stonefish, which is classified within the family Scorpaenidae, the scorpionfish and close relatives. Stonefish are the most venomous fish known; stings can be fatal to humans. They are found in the coastal regions of the Indo-Pacific. They are sometimes confused with the freshwater lionfish.

Closest relatives