25 Deep Sea Mysteries And Oddities That Will Leave You Baffled

Posted by , Updated on May 27, 2015

More humans have walked on the moon than have been to the deepest parts of planet Earth. Covering 70% of Earth’s surface, the oceans are the largest habitat in the world yet we only know around 1% of the seafloor. Many a mystery surrounds the deep blue and in this list we dredge up some of the least understood. Check out these 25 deep sea mysteries and oddities that will leave you baffled!

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Giant Squid

Giant Squid fight with sperm whale

A massive ocean creature, the giant squid has made a lot of noise in the media but relatively little is known about it. Measuring up to 43 feet (13m) long and weighing up to 1,000 pounds (450kgs), the first live giant squid was filmed in July 2012.


Colossal Squid

Colossal squid on shore

But If you thought it couldn’t get bigger than the giant squid, think again. There’s even less known about the colossal squid which has eyes bigger than your hand. It predominantly lives in the Antarctic and has 25 rotating hooks on the end of each tentacle.


Sulphur Lake

Harvesting sulfur

On the Pacific Ring of Fire lies a lake – a very special lake because it’s both underwater and made entirely of molten sulphur. Thirteen hundred feet (400m) below sea level, the area teems with life including crabs and shrimp specially designed for this bizarre condition.



Stomias boa boa

Firing out a beam of red light from beneath each eye, the bioluminescent dragonfish is the only animal that can see other dragonfishes’ red light. That’s the ultimate in unbreakable secret code.


Macropinna Microstoma


The Macropinna is a fish with a very rare and little understood composition: its head is covered by a transparent, fluid-filled dome. Beyond that, it has barrel-shaped eyes which point up (through the dome) while it’s horizontal in the water and can be rotated forward if it changes position.

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