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Top Ten Deadliest Jellyfish

Portuguese Man o' War (Physalia Physalis)
Portuguese Man o' War (Physalia Physalis)

The Atlantic Portuguese man o' war (Physalia physalis), also known as the man-of-war, is a marine hydrozoan of the family Physaliidae found in the Atlantic, Indian and Pacific Oceans. Its venomous long tentacles deliver a painful sting, which is venomous and powerful enough to kill fish or (rarely) humans.

Irukandji Jellyfish (Carukia Barnesi)
Irukandji Jellyfish (Carukia Barnesi)

Irukandji jellyfish are very small, with a bell about 5 millimetres (0.20 in) to 25 millimetres (0.98 in) wide (or wider) and four long tentacles, which range in length from just a few centimetres up to 1 metre (3.3 ft) in length.

Box Jellyfish (Chironex Fleckeri)
Box Jellyfish (Chironex Fleckeri)

"Box jellyfish" and "sea wasp" are common names for the highly venomous Chironex fleckeri. However, these terms are ambiguous, as "sea wasp" and "marine stinger" are sometimes used to refer to other jellyfish. [citation needed] At least 51 species of box jellyfish were known as of 2018. These are grouped into two orders and eight families.

Mosquitoes
Mosquitoes

Most Dangerous Jellyfish. 7 November 25, 2013. For an animal (just) that is 95% water, ... Not pleasant, but closer to the pain of a mosquito bite than a hornet sting.

Snakes
Snakes

7 Most Deadliest, Most Poisonous Jellyfish in the World by Kye | Apr 24, 2014 | Animal Profiles, Earth Matters, Nature If you have ever been swimming and noticed a jellyfish floating toward you, odds are you scrambled to get away as quickly as you possibly could.

Dogs
Dogs

7 Most Deadliest, Most Poisonous Jellyfish in the World by Kye | Apr 24, 2014 | Animal Profiles, Earth Matters, Nature If you have ever been swimming and noticed a jellyfish floating toward you, odds are you scrambled to get away as quickly as you possibly could.

image: urdogs.com
Crocodiles
Crocodiles

7 Most Deadliest, Most Poisonous Jellyfish in the World by Kye | Apr 24, 2014 | Animal Profiles, Earth Matters, Nature If you have ever been swimming and noticed a jellyfish floating toward you, odds are you scrambled to get away as quickly as you possibly could.

Hippopotamus
Hippopotamus

7 Most Deadliest, Most Poisonous Jellyfish in the World by Kye | Apr 24, 2014 | Animal Profiles, Earth Matters, Nature If you have ever been swimming and noticed a jellyfish floating toward you, odds are you scrambled to get away as quickly as you possibly could.