What is the deadlist fish in ocean?

The stonefish, Synanceia horrida, is the most venomous fish in the ocean. It is found in the Indo-Pacific region, from the Red Sea to northern Australia. The stonefish has a well-camouflaged body that resembles a rock, and its dorsal fin contains 13 sharp spines that can inject a deadly venom. The venom is a neurotoxin that causes intense pain, paralysis, and can be fatal if not treated quickly.