Box jellyfish, cone snails, stonefish, blue-ringed octopus and venomous rays. What their venoms do, how stings are treated and how divers and swimmers reduce risk.
8 published
Box jellyfish venom acts within minutes. The right response in those minutes is well studied — and it is not urine.
Mahmoud Osama · Updated 14 Aug 2026
Cone snails deliver one of the most chemically sophisticated venoms in nature, a cocktail of conotoxins so precise it has inspired new painkillers.
Mahmoud Osama · Updated 5 Sept 2025
Camouflaged perfectly against rock and coral, the stonefish delivers one of the most painful stings in the ocean through 13 needle-sharp dorsal spines.
Mahmoud Osama · Updated 18 Sept 2025
Barely the size of a golf ball, the blue-ringed octopus carries enough tetrodotoxin to kill an adult human, with no antivenom available.
Mahmoud Osama · Updated 2 Oct 2025
A sting from a jellyfish barely bigger than a fingernail can trigger Irukandji syndrome, a delayed cascade of pain, vomiting, and cardiovascular danger.
Mahmoud Osama · Updated 20 Oct 2025
Often mistaken for a jellyfish, the Portuguese man o' war is a colony of specialized organisms trailing tentacles capable of stinging long after washing ashore.
Mahmoud Osama · Updated 8 Nov 2025
Lionfish combine striking beauty with a set of venomous spines, and their explosive spread through the Atlantic and Caribbean has made stings increasingly common.
Mahmoud Osama · Updated 25 Nov 2025
Most stingray injuries happen when someone steps on a ray buried in sand, triggering a defensive strike from a venomous barbed tail.
Mahmoud Osama · Updated 10 Dec 2025
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