World's deadliest sea creatures

Known for its venomous tentacles, the box jellyfish can cause heart failure and death within minutes of a sting.

This camouflaged fish has venomous spines that can deliver excruciating pain and potentially fatal effects if not treated quickly.

Armed with a harpoon-like tooth, the cone snail injects venom that can lead to paralysis and death; there is no antivenom.

Small but highly venomous, this octopus can deliver a bite that causes paralysis and respiratory failure, often without warning.

While not the most dangerous in terms of frequency, great white sharks have powerful jaws and can cause fatal injuries.

Contains tetrodotoxin, a potent neurotoxin that can be deadly if ingested, making it dangerous in both the wild and as a delicacy in some cuisines.