Each box jellyfish has more than 60 human deaths' worth of poison
The Sonora state in northwest Mexico and the southwest United States are home to the deadly Gila monster species of lizard.
Even though about 10% to 15% of bites from funnel-web spiders are poisonous, all bites should be handled as potentially life-threatening.
Conus toxins can cause paralysis by affecting the nervous system, which can result in respiratory failure and death.
The most poisonous fish known is the stonefish, and people can die from its stings.
Its venom is the most toxic of all snakes. The School of Chemistry reported that 110mg was the highest yield ever measured (per bite). This indicates that a single bite might likely result in the death of over 100 persons or 250,000 mice.
One of the very few poisonous mammals is the platypus, a monotreme mammal found in Australia and Tasmania.
They have poisonous oil-emitting glands behind their armpits, and when they lick those glands, their saliva mixes with the oil to create the venom.