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Covering 71% of Earth’s surface, our oceans are home to living creatures that fetch extraordinary stories.
And you know what?
What we have learned about these creatures is limited and may be far from the simple truth.
In this blog, join us and let our minds be amazed by 5 mind-blowing facts about oceans.
5 Mind-Blowing Facts About Oceans
1. The largest animal on Earth is found in the ocean.

What do people usually think?
People believe that the biggest animal on Earth is the whale shark because its name includes “whale.”
Meanwhile, some believe that the biggest animal is not in the ocean but on land, specifically the dinosaur, because they are depicted as large in movies and illustrations.
Here is the astonishing reality:
The biggest animal is not the whale shark or a dinosaur, but the blue whale.
According to National Geographic, the biggest animal is the blue whale (Balaenoptera musculus), weighing up to 200 tons.
This is larger than the whale shark, which weighs around 20.6 tons.
The blue whale is also larger than dinosaurs, specifically Argentinosaurus, which weighed 65-80 tons.
Ever heard of that before?
2. Some sharks have lived for centuries.

What do people usually think?
People usually think that since sharks are classified as fish, they can only live shorter than we all know.
Well, that sounds interesting!
But what if some fish could live over 200 years? Would you believe?
Here is the astonishing reality:
Yes, most fish have an average lifespan of 20 years, such as goldfish.
However, according to the National Ocean Service NOAA, the Greenland Shark is a type of shark that can live for centuries.
It can live for over 250 to 500 years because it has a slow metabolism and can adapt to cold and deep water.
This slow metabolism can result in gradual aging and stagnant movement, which helps them to live longer.
Pretty wild, right?
3. The jellyfish can live forever

What do people usually think?
Many of us think that there are no living creatures that can live forever like immortals, such as the jellyfish.
They often imagine how that creature can live forever, when they see jellyfish on seashores dying.
This will blow your mind because jellyfish can live indefinitely.
Here is the astonishing reality:
The immortal jellyfish (Turritopsis dohrnii) can live forever because it can reverse age and regrow its cells.
According to BBC Earth, this immortal jellyfish may die physically, but its cells can reaggregate, allowing it to reverse its age and regrow its cells
However, this jellyfish is still capable of dying, especially since its size is only 3–4.5 millimeters; they are vulnerable to being eaten by predators, such as fish, sea turtles, slugs, and other creatures.
Biologically, it can live forever, but it can’t escape the harm posed by other sea creatures, which gives it the possibility of dying.
Sounds unbelievable, right?
4. There’s a glass octopus.

What do people usually think?
We often perceive the glass octopus as completely invisible and hard to spot in the oceans.
You won’t believe this, but the organs of this creature is visible to our eyes.
Here is the astonishing reality:
The body of the glass octopus (Vitreledonella richardi) is transparent; however, its organs can be seen through its translucent body.
Even though it is transparent, the optic nerve, eye, and digestive tract are visible.
Aside from that, the glass octopus can still change color, and the yellow specks from its webbing, or chromatophores, help it blend with its surroundings.
Who could’ve imagined this?
5. There is a creature with three hearts and blue blood

What do people usually think?
People used to think it was impossible for living things to have blue blood and three hearts.
This is because they were taught in school that the heart is only one and the color of blood is red.
But this will blow your mind because there is a creature that exists with three hearts and blue blood.
Here is the astonishing reality:
As per National Geographic, an octopus has three hearts and blue blood. Its blue blood contains copper, rather than iron, which gives its blood a blue color.
Moreover, its three hearts have different roles: one circulates blood around the body, and two are responsible for pumping it to the gills to pick up oxygen.
Have you ever thought about that?
Mind-Blowing Facts About Oceans
Indeed, our oceans are home to living creatures with mind-blowing stories.
These extraordinary characteristics of sea creatures remind us that there could be much more knowledge we need to discover!
Among these ocean secrets, which surprised you most? Share your thoughts in the comments below!
