The blue-ringed octopus, despite its small size (often no larger than a golf ball), carries enough potent neurotoxin (tetrodotoxin) to kill 26 adult humans within minutes, with no known antidote.
Discoverer / Person
null
Year Discovered
null
Field
Toxicology
Evidence Quality
Well-Documented
Why It Matters
Its small size belies an extreme level of toxicity, making it one of the ocean's most dangerous creatures.
Source Consensus
1 sources agreed