Pufferfish are infamous for containing tetrodotoxin, an extremely potent neurotoxin. Ingesting even a small amount of tetrodotoxin can be fatal.
Recognised as the world’s most venomous fish, the stonefish conceals itself on the ocean floor. Its dorsal spines deliver potent venom, causing intense pain and, death in extreme cases.
Found in the waters of the Indo-Pacific region, box jellyfish possess tentacles laden with powerful toxins. Their sting can cause cardiac arrest and is potentially fatal without prompt medical intervention.
Despite its small size, the blue-ringed octopus harbours potent venom that can lead to respiratory failure. Found in the Pacific and Indian Oceans, it is considered one of the most venomous creatures on Earth.