scientific name Scorpaenopsis diabolus, is a venomous fish species found in the Indo-Pacific region. Despite its name, the False Stonefish is not a true stonefish but belongs to the same family Scorpaenidae, which includes some of the most venomous fish in the world.

The False Stonefish is a small-sized fish, usually measuring up to 20 cm in length. It has a relatively flat and wide body, similar to a typical stonefish. Its overall shape is rounded with a large head and a mouth that extends beyond the eyes. It has 13 dorsal spines with membranes between them, and the spines are covered with skin flaps, making them difficult to see. The fish's body is camouflaged with mottled brown, black, and beige colors that help it blend in with the surrounding environment. This species also has a pair of distinctive, vertical black bars on its head.

The False Stonefish is a solitary fish that prefers shallow, sandy or rocky bottoms, estuaries, and coral reefs. It is usually found hiding under rocks or in crevices, waiting for prey to pass by. The fish feeds on small fish and crustaceans, which it sucks into its large mouth with powerful suction.

The False Stonefish is considered a dangerous fish because of its venomous spines, which it uses for self-defense. The fish's venom is potent and can cause severe pain, swelling, and even death in some cases. Its venomous spines are located on the dorsal, anal, and pelvic fins, and can cause a painful and life-threatening injury if stepped on or touched. Therefore, it is essential to be cautious when swimming or diving in areas where the False Stonefish is known to reside.

In conclusion, the False Stonefish may not be a true stonefish, but it is still a venomous and dangerous fish. Its mottled brown, black, and beige colors, vertical black bars on its head, and camouflaging abilities make it difficult to spot in its natural habitat. Therefore, it is important to be aware of this fish's presence and take necessary precautions while in the water.