The most venomous fish looks like a rock

The Stonefish is the world’s most venomous fish thanks to its ability to inject deadly neurotoxins from the spines on its dorsal fin into its target. The Stonefish’s neurotoxins work by attacking the nerve cells of whatever it is injected into, causing severe pain, sickness, nausea, paralysis and, depending on depth of spine penetration into skin, death within three hours.

Unlike most other poisonous fish who dwell in the dark depths of the ocean – leaving little chance of human contact – Stonefish dwell in shallow waters and are likely to be found anywhere between just beneath the surface down to a depth of three metres (9.8 feet).