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Top 7 Awesome Sea Monsters

Updated on July 24, 2017

Mysteries of the Sea

Ever since the beginning of mankind, we've been fascinated by the massive oceans of this world. The beauty, the terror, and the life found within the murky water latches onto us, driving us to explore the mysterious - and often dangerous - waters. Our species has pondered various monsters hidden in their aquatic home; some even have many reported sightings. Whether you believe in any of these creatures or not, today we'll explore seven amazing animals from the ocean! We'll begin with the well-known..

The Loch Ness Monster
The Loch Ness Monster

7. Loch Ness Monster

The Loch Ness Monster is a long-necked reptile supposedly residing in Loch Ness, a lake in the Scottish Highlands. This creature, often called Nessie, was first discovered in 1933, and we've been trying to obtain proof of it ever since. Many photographs and sonar readings exist of Nessie, but the scientific community doubts the validity of such evidence. Still, Nessie remains one of the most popular legendary creatures, and many researchers still attempt to find proof of it. Though most scientists don't believe it exists, they'll agree that if it does, it's probably a plesiosaur, an ancient dinosaur with a long neck and flippers.

Does it Harm Humans?
No, not really. Nessie seems fairly timid, and likely only eats fish.


6. Iku-Turso

Finnish mythology speaks of the malevolent Iku-Turso, sometimes called the Eternal Turso. We don't owe much to this guy; he's called a god of war and the father of diseases. He supposedly patrols the Atlantic, wreaking havoc wherever he goes. Iku-Turso's features are interesting: he's depicted as a bearded and horned monster, likely meaning he's a mammal rather than fish or reptile.

Does it Harm Humans?
Well, yes, this dude's a huge jerk. But in the Finnish epic, Kalevala, Iku-Turso was captured; he obtained freedom by promising to remain at the ocean floor for the rest of his days. Assuming he honors his word, we should be fine.


5. Umibozu

Next, the fearsome Umibozu, figures from Japanese folklore. These tales state that when a priest drowns at sear, his spirit remains connected to the ocean, and manifests as a huge, dark, round-headed figure called an Umibozu.

Umibozu are irritable souls. Any attempt to communicate with them results in a capsized boat. Sometimes, they'll even ask a crew for barrels, then drown the hapless men in the containers. Beware the dark waters of the Pacific, lest an eternally tortured Umibozu claim your life.

Does it Harm Humans?
Only a bit. Umibozu are merciless, but tend to bug you only after being provoked. If you see one, just calmly and swiftly sail away without speaking to the creature.


4. Hydra

Fourth spot goes to the serpent-like Hydra, a monster from Greek mythology. Hydra has been shown as the guardian of both lakes and oceans, so it can exist in both salt and fresh water. The monster is large and hard to kill; it possesses a great many heads, and whenever one is cut off, two more take its place. The Greek hero Heracles (we often call him Hercules) eventually defeated the monster, but only with the aid of his nephew, he discovered that when a head was cut, it could be prevented from growing back by using fire. Hydra was ultimately defeated by the two Greeks, but the fact that Heracles himself needed help to stop it demonstrates its awesome might.

Does it Harm Humans?
Yes. Hydra are supposedly dead, but if you encounter one, your best hope is hightail it out of there.


3. Leviathan

The term Leviathan can refer to any large sea monster, but did you know a singular Leviathan is referred to in the Bible? The book of Job speaks of this powerful beast, calling it immovable, fire-breathing, and superior to any earthly creature. Only the end of time itself is said to kill the Leviathan. Most renditions of the monster show it with a giant and long body, and either the head of a serpent or whale. Regardless, Leviathan's razor-sharp teeth, durable body, and belligerent attitude make it a large threat to any sailors it encounters.

Does it Harm Humans?
Yea, this sea serpent is lean and mean; keep the heck away from it.


2. Kraken

Today's silver medal goes to the monstrous Kraken, a creature usually encountered in the waters near Norway and Greenland. The Kraken is at times depicted as a giant squid; other appearances give it a demonic body with only the tentacles of a squid. Regardless, one trait of the monster never changes: Its size. The Kraken is simply a beast of monumental proportions; even in legends, gods and heroes often lose to the monster. Any who value their lives will take care when traveling to Norway.

Does it Harm Humans?
Yes. The Kraken hates people, and will do its best to destroy us. As tasty as calamari is, you're gonna want to try to avoid this squid. Still, a monster even bigger than the Kraken exists..

Honorable Mentions

Greek god of the sea.
The Rainbow Fish
A man-eating beast as large as a whale.
Beautiful monsters from Greek legend who lure sailors to their demise.
Some more powerful beings from the ocean.
Jormungandr fights Thor (that itty-bitty guy near the upper right).
Jormungandr fights Thor (that itty-bitty guy near the upper right).

1. Jörmungandr

Different people refer to the gargantuan Jörmungandr as Midgard or World Serpent. This monster grew so huge that his tail could wrap around Earth and reach his head. That is big. You're surely familiar with the Norse god Thor, the divine being with control over lightning? Yea, he's destined to be poisoned and killed by this massive serpent during the end of the world (Ragnarok). I'm surprised Jörmungandr even bothers with poison; his size should be sufficient to fight any being. Thanks to his amazing size and deadly nature, Jörmungandr is the sea monster you never want to meet.

Does it Harm Humans?
Heck yes. This snake can't really be outrun, and is strong enough to defeat even Thor. And the worst part? It's said that when Jörmungandr perishes, the world will end. So even if you could somehow beat him, you'd still end up losing.

Your Favorite

Which creature do you favor?

See results

Future Myths

After reading about these beasts, sharks may be the least of our worries when braving the ocean. But while we're safely on land, feel free to vote for your favorite behemoth, and I'll see you at our next exploration of various legendary beasts!


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    • aziza786 profile image

      Zia Uddin 

      20 months ago from UK

      I like Leviathan. Good hub by the way.

    • profile image


      4 years ago

      What about cthulhu

    • Jeremy Gill profile imageAUTHOR

      Jeremy Gill 

      5 years ago from Louisiana

      Agreed, PaigSr, there's a lot of interesting lore regarding Nessie. Some things have been exposed as hoaxes, but other pieces of evidence remain open to interpretation.

    • PaigSr profile image


      5 years ago from State of Confusion

      For those of us in the states there is also Bessy. The cousin of The Loch Ness Monster. But the interesting part is they have not been able to prove the picture of Nessie on the lake as being fake.

    • Jeremy Gill profile imageAUTHOR

      Jeremy Gill 

      5 years ago from Louisiana

      Thanks, Cornelia. There's definitely some awesome stories/creatures in Finnish and Scandinavian mythology!

    • CorneliaMladenova profile image

      Korneliya Yonkova 

      5 years ago from Cork, Ireland

      Iku-Turso is my favourite, I love Finnish and all Scandinavian mythology. Thank you for this awesome hub, voted up :)


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