Category: UNDERWATER FACTS


Underwater Fact 148

Innovative technology allows researchers to learn more about the fascinating world of Emperor Penguins.

Brooding emperor penguin with its chick approached by a rover…   © Nature Methods

Investigating wild animals has always been a challenge to researchers. Especially when dealing with shy animals like penguins. When humans approach, Emperor Penguins normally back away and their heart rate goes up. That’s not what the scientists need when they want to check heart rate, health and other penguin parameters.
Consequently, a group of international scientists have created a remote control rover disguised as a chick to snuggle up to penguins in Adelie Land, Antarctica – the same place where the 2005 documentary March of the Penguins, was filmed.

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Underwater Fact 147

One look at a vampire squid, and you’d think it was the product of a cheesy horror/sci-fi movie. Vampyroteuthis infernalis (meaning “vampire squid from hell”) is the sole living member in the Order Vampyromorphida, and shares characteristics of both octopuses (Order Octopoda) and squids (Order Teuthida).

Vampire Squid   © National Geographic

This species first appeared around 300 million years ago and has changed very little since then, making it a living fossil that may represent an ancestral line between octopuses and squids.
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Octopuses have the largest brains of any invertebrate.

Common Octopus   © ARKive

The fact that these creatures, whose ancestors diverged from the lineage that would lead to ours roughly 500 to 700 million years ago, have developed intelligence, emotions, and individual personalities is challenging our understanding of consciousness itself.

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Underwater Fact 145

Cownose Rays are known to take on long migrations in schools of thousands of individuals, moving northwards in late Spring and southwards in late Autumn. It is believed that this migration is initiated by the orientation of the sun and by water temperature.

 01-Cownose Rays migration, Gulf of MexicoCownose Rays migration, Gulf of Mexico   © Sandra Critelli

Cownose Rays can be recognised by their unusual bi-lobed head. Under the snout are two large fleshy lobes. These are often mistaken as the entrance to the mouth. The mouth however, is on the underside the fish.

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Underwater Fact 144

Unlike most other whales, the beluga has a flexible neck that enables it to turn its head in all directions.

BelugaWhalesBeluga Whale   © Clifton Hill

Belugas are also called white whales, and their unusual colour makes them one of the most familiar and easily distinguishable of all the whales. Calves are born grey or even brown and only fade to white as they become sexually mature around five years of age.

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Underwater Fact 143

When a male penguin falls in love with a female penguin, he searches the entire beach to find the perfect pebble to present to her.

natgeoPenguinsPenguins sharing pebbles   © National Geographic

Humans give flowers and candy when impressing a lady. Penguins give rocks. Not just any rocks, though — male Gentoo penguins search through piles of pebbles to find the smoothest, most perfect ones. When a penguin has selected his pebble, he presents it to his intended companion. If she approves, she puts the stone in her nest and the two are well on their way to becoming mommy and daddy birds. Pebbles are so important to the penguins that males often fight over the prettiest selections.

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Underwater Fact 142

Manta rays have the largest brain to body weight ratio of any living fish.

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Underwater Fact 141

Bottlenose Dolphins give each other names by calling out to each other in individual whistling tunes.

Bottlenose Dolphin   © Flip Nicklin

Out in the pristine waters of Sarasota bay in Florida, scientists from Mote Marine Lab have spent the past thirty years studying the local residents – Bottlenose Dolphins.
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Underwater Fact 140

It is a common known fact that noise travels about five times more quickly in the sea. But did you know that there are conditions where sound can travel similar to light in a fiber-optic cable?

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Underwater Fact 139

The Jellyfish population in Japanese waters is 100 times greater than 20 years ago.

Nomura’s Jellyfish swarm   © Amazing Story’s

Nomura’s Jellyfish are in the same size class as the lion’s mane jellyfish, the largest jellyfish in the world.
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