Which is the most poisonous fish in the world?

Online Answer
reef stonefishThe most venomous known fish is the reef stonefish. It is an ambush predator which waits camouflaged on the bottom. The beautiful and highly visible lionfish uses venomous barbs around its body as a defence against predators..
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Frogfish often mimic venomous animals, while stonefish boast spines with toxic sacs. The potent venom can kill a person within two hours without treatment, so the fish often pose a hazard to divers, particularly those who walk along the ocean floor.