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The ghostly octopus Casper has been hooking scientists since 2016

In 2016, scientists photographed an octopus at a depth never seen before.

A white octopus sat about 5 km below the surface of the ocean floor near Hawaii.Researchers soon nicknamed the deep-sea cephalopod "Casper" for its pale, ghostly appearance.

Previously, only "Dumbo" octopuses were observed at this species depth. Sit on your head like ears.

Six years after the discovery, researchers revealed the details of their startling discovery to The Guardian.

Perhaps most interesting are the many octopuses they discovered afterward.

The team now has years' worth of footage showing that there are more of these white octopuses.

"They can be pretty common," says Janet Voight, a researcher at Chicago's Field Museum of Natural History.

They also observed clumps of octopus eggs in sponges, suggesting that the creatures do not simply lay their eggs on solid rock as they used to. I believed.

According toScience, octopuses like Casper grow about 30 rudimentary stalks on dead sponge stems. I think I'm going to lay eggs. They then envelop the eggs, sometimes for very long periods of time, to protect them as they grow.

Their octopuses may not leave eggs to feed.

Much more has surprised researchers about Casper. For one, his ghostly white appearance.

Octopuses often have colorful skin that adapts to their local environment, creating a camouflage effect. Researchers speculate that the creature's pale coloration may be due to a lack of pigments contained in his deep-sea diet.

Casper also has relatively short arms for an octopus.

"The shallower and more tropical the water, the longer and thinner the arms," ​​the researchers said.

The team did not know why Casper's arms were so short and curly. I think it might have something to do with how they catch prey at such depths.

For now, researchers are continuing their ocean expeditions to find out more about Casper and his fellow deep-sea creatures. but it is very difficult to collect samples at such depths.

"For an octopus, you have to have it in your hand," Voight explained.

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