Most venomous fish
Synanceia stonefish
Not Applicable ()

The most venomous fish in the world are the stonefish (family Synanceiidae) of the tropical waters of the Indo-Pacific, and in particular Synanceia horrida, which has the largest venom glands of any known fish. Direct contact with the spines of its fins, which contain a strong neurotoxic poison, can prove fatal.

The most poisonous fish, meanwhile, are the pufferfish (Tetraodon spp.) of the Red Sea and Indo-Pacific region. Their bodies contain a toxin called tetrodotoxin, one of the most powerful non-proteinous poisons, which can be deadly if ingested.