Top 6 Most Venomous Sea Creatures

Blue Ringed Octopus Venom

The mysterious sea waters provide habitat for some of the most extraordinary creatures on planet. Some of them are big, some are small, others are creepy, but the ones we are about to focus on are poisonous, very poisonous.

Although these species are quite different among each other, one thing binds them all together - they are the most venomous creatures of the sea. Check out our top list below.


6. Lionfish

Lionfish Venom

Primarily located in the Indo-Pacific ocean, the lionfish, or pterois as it is scientifically known, is most commonly recognized by it's beautiful color, which only serves as a bait to attract the unsuspecting victims to it's poisonous fin rays.

With size up to 16.5 inches (42 cm), it can prove as deadly to humans, causing nausea, fever, breathing problems and even heart failure in some cases.


5. Textile Cone Snail

Venomous Cone Snail

Another beautifully colored creature lands on our #5 - the conus textile, or the texture cone snail. What makes it stand out among snails is the ability to sting, as well as poison it's victims. The maximum length of 6 inches (15 cm) make this mollusk no joke by all means.


4. Irukandji Jellyfish

Irukandji Jellyfish Venom

As the smallest creature on our list, with a bell no wider than 0.39 inches (10 mm), the irukandji jellyfish has something special in store to make it's venom stand out among others. Beside the poison being 1,000 more potent that the venom of tarantula it also causes something called irukandji syndrome.

Apart from severe pain and nausea, it gives it's victims an uncontrolled feeling of an impending doom. If injected with enough venom, it can prove as a horrifying way to die.


3. Laticauda Colubrina Sea Snake

Venomous Sea Snake

Another inhabitant of the Indo-Pacific region, this time around a reptile. The colubrine sea krait as it is also known is a higly venomous snake and can easily prove fatal to humans. Despite not being aggressive, it is best left alone. The laticauda colubrina can reach size of about 56 inches (142 cm).

Sea Snake Venom


2. Blue Ringed Octopus

Blue Ringed Octopus Venom

Perhaps the most distinctive creature on our list, the blue ringed octopus lands at #2 despite the size not bigger than 8 inches (20 cm). It is packed with enough venom to kill 30 humans within 30 minutes. The poison itself is a whopping 10,000 times stronger than cyanide. The worst part is, no antivenom has yet been discovered.


1. Box Jellyfish

Box Jellyfish Poison

This brings us to the most venomous and deadliest sea creature of all - the dreaded box jellyfish. With up to 60 tentacles loaded with enough venom to kill 3000 humans (that's right, three thousand), this deadly jellyfish can cause death within mere 3 minutes. As far as the size is concerned, the box jellyfish can reach lenght of about 15 feet (4.6 m).

Box Jellyfish Venom

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