The largest ecosystem on the planet
Curiosities about marine animals
Why does the pharmaceutical industry depend on horseshoe crabs?
Since the days of the dinosaurs
Blue blood for our health
Used to test medicines and vaccines
What is the relationship between whales and CO2?
Why do tunas even swim while they sleep?
This marine species that has three hearts and nine brains
How do octopuses communicate and reproduce?
Intelligent creatures
The longest gestation period in the animal kingdom
The males produce the babies
Hermaphrodites
Hybrid corals
Are there fish that meet to go hunting?
Team work
Albatrosses used to catch poachers
Detect illegal fishing
And it worked
Cool facts about sea creatures that will surprise you
(1/20)
The largest ecosystem on the planet

The oceans form the largest ecosystem on the planet. They are essential for regulating the climate, and they provide us with raw materials such as food and active ingredients used, particularly for medicines. More than 90% of goods are transported by sea, and ocean waters absorb about one-third of man-made CO2.

Cool facts about sea creatures that will surprise you
(2/20)
Curiosities about marine animals

The sea is irreplaceable, and its inhabitants are fascinating. Did you know that some fish meet to go hunting? That all clownfish are born male? Or that the Covid vaccine owes a lot to a very particular inhabitant of the oceans?

Cool facts about sea creatures that will surprise you
(3/20)
Why does the pharmaceutical industry depend on horseshoe crabs?

This unusual species owes its name "horseshoe crab" to its appearance. The mouth of this sea creature is located in the middle of the body, and it has several eyes distributed all over the body.

Cool facts about sea creatures that will surprise you
(4/20)
Since the days of the dinosaurs

Horseshoe crabs have been around since the time of the dinosaurs, but since 2016, they have been considered an endangered species. Why are they in danger? Because the pharmaceutical industry exploits their precious blue blood.

Cool facts about sea creatures that will surprise you
(5/20)
Blue blood for our health

Their sky-blue blood contains amoebocytes, which react to toxic substances and can thus be used for the so-called horseshoe crab amoebocyte lysate test.

Cool facts about sea creatures that will surprise you
(6/20)
Used to test medicines and vaccines

This test is necessary for the marketing authorization of medicines and vaccines. Hundreds of thousands of horseshoe crabs die each year for this reason.

Cool facts about sea creatures that will surprise you
(7/20)
What is the relationship between whales and CO2?

Whales store CO2! It might seem hard to believe, but researcher Ralph Chami and a team of IMF economists found that a large whale captures 33 tonnes of CO2 during its lifetime, compared to just 22 kilos per year for a tree.

Cool facts about sea creatures that will surprise you
(8/20)
Why do tunas even swim while they sleep?

Deep-sea fish, such as tuna or shark, must swim constantly in order to be able to absorb sufficient oxygen in the gills. This is where the name Tuna comes from, as "Tuna" means "to rush".

Cool facts about sea creatures that will surprise you
(9/20)
This marine species that has three hearts and nine brains

Each of the eight arms of the octopus can be moved independently of the others because they are all controlled by independent nervous systems: it is for this reason that it is said to have nine brains. Their two additional hearts allow them to have a greater blood flow in the gills.

Cool facts about sea creatures that will surprise you
(10/20)
How do octopuses communicate and reproduce?

The procreation of octopuses requires the death of the parents. The male dies immediately after mating and the female as soon as her offspring hatch. This extraordinary marine species is able to modify its appearance, not only to camouflage itself, but also to communicate with its congeners.

Cool facts about sea creatures that will surprise you
(11/20)
Intelligent creatures

Countless studies have shown the intelligence of these cephalopods. The announcement of the opening of the first octopus farm in the world, intended for human food, is therefore highly contested among scientists and biodiversity advocates.

Cool facts about sea creatures that will surprise you
(12/20)
The longest gestation period in the animal kingdom

Like many other sharks, the spiny dogfish is a viviparous species: the eggs hatch in the mother's womb. Gestation can last between 18 and 24 months in spiny dogfish, a record in the animal kingdom. This species is now endangered, mainly because we eat it too often as with eel or sea sturgeon.

Cool facts about sea creatures that will surprise you
(13/20)
The males produce the babies

Curiosity in the animal kingdom: in seahorses, it is the males who bear the offspring. The females deposit their eggs directly into the pouch of the males, where they are then fertilized. Then the pouch closes and the offspring are fed by the father.

Cool facts about sea creatures that will surprise you
(14/20)
Hermaphrodites

Clownfish (which became famous all over the world thanks to the cartoon "Finding Nemo") are all born male. But some then become females. “Clownfish can switch from one gender to another like turning a switch on and off,” biologist Mario Ludwig told Deutschlandfunk-Nova radio. "So gender switching is not a problem for them."

Cool facts about sea creatures that will surprise you
(15/20)
Hybrid corals

Hybrid corals that belong to the category of cnidarians reproduce can sexually and provide both male and female part of reproduction. For this, they emit both eggs and sperm at the same time.

Cool facts about sea creatures that will surprise you
(16/20)
Are there fish that meet to go hunting?

The answer is yes ! Research results from Alexander Vail and his team at the University of Cambridge show that such cooperation exists between perch and moray eels (pictured).

Cool facts about sea creatures that will surprise you
(17/20)
Team work

The perch watch the high seas, while their hunting companions take care of flushing out the prey that flees into the crevices. According to the observations that have been made, the perches are always at the initiative of this unique cooperation among marine species, by signaling to the moray eels with a nod of the head.

Cool facts about sea creatures that will surprise you
(18/20)
Albatrosses used to catch poachers

"The albatrosses: guardians of the oceans." Such was the idea of a pilot project led by marine ecologist Henri Weimerskirch, of the CNRS. 169 birds were equipped with a GPS. To fetch food, they can travel up to 15,000 kilometers and track trawlers 30 kilometers away.

Cool facts about sea creatures that will surprise you
(19/20)
Detect illegal fishing

The capacity of surveillance patrols against illegal fishing is strongly limited by the size of the oceans. It is easy for the fleets in question to turn off the automatic identification system that all boats are equipped with. But their radars always remain on for security reasons, and this data is cross-referenced with the coordinates of the albatrosses when they stay longer at a specific point on the high seas.

Cool facts about sea creatures that will surprise you
(20/20)
And it worked

In six months, the albatrosses flushed out 100 illegal fishing convoys. A successful experience that may help to reduce overfishing a little in the future.

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