Synanceia verrucosa
Encounter Rate
Spotting Difficulty
Best Season
Year-round
Depth Range
1-30 meters
The stonefish is the most venomous fish in the world and one of the most dangerous animals in Komodo's waters — yet it is also one of the hardest to see. This master of camouflage sits motionless on the reef floor, its warty, encrusted body perfectly mimicking a lump of coral rubble or algae-covered rock. Reaching about 40 centimetres in length, the stonefish's dorsal spines contain an incredibly potent venom that can cause excruciating pain, tissue necrosis, and in rare cases death if a spine punctures human skin. In Komodo, stonefish are found on sandy and rubble substrates at shallow to moderate depths, often near reef edges and in areas where coral rubble accumulates. They are ambush predators of remarkable patience, remaining completely motionless for hours or even days until a small fish or crustacean passes within striking range. Their strike is one of the fastest in the fish world, creating a vacuum that sucks prey into their upward-facing mouth in milliseconds. Despite the danger they represent, stonefish encounters while diving are extremely rare because they are nearly impossible to spot — which is precisely what makes them dangerous to waders and divers who place their hands on the bottom.
Average Size
20-30cm
Size Range
10-40cm
Maximum Size
40cm
Ambush predator feeding on small fish and crustaceans. Strikes with one of the fastest attacks in the fish world, creating a vacuum that sucks prey into its upward-facing mouth in milliseconds.
The stonefish is the most venomous fish in the world and one of the most dangerous animals in Komodo's waters — yet it is also one of the hardest to see. This master of camouflage sits motionless on the reef floor, its warty, encrusted body perfectly mimicking a lump of coral rubble or algae-covered rock. Reaching about 40 centimetres in length, the stonefish's dorsal spines contain an incredibly potent venom that can cause excruciating pain, tissue necrosis, and in rare cases death if a spine punctures human skin. In Komodo, stonefish are found on sandy and rubble substrates at shallow to moderate depths, often near reef edges and in areas where coral rubble accumulates. They are ambush predators of remarkable patience, remaining completely motionless for hours or even days until a small fish or crustacean passes within striking range. Their strike is one of the fastest in the fish world, creating a vacuum that sucks prey into their upward-facing mouth in milliseconds. Despite the danger they represent, stonefish encounters while diving are extremely rare because they are nearly impossible to spot — which is precisely what makes them dangerous to waders and divers who place their hands on the bottom.
This species plays an important role in the marine ecosystem of Komodo National Park. Responsible diving practices help protect these animals and their habitat for future generations.
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Extremely dangerous. The venom causes immediate, agonising pain that can last for days, with potential complications including tissue death, temporary paralysis, and in rare cases cardiac arrest. Seek emergency medical treatment immediately and apply hot water to the wound.
