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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Under(sea)ground Bacteria

Ancient bacteria and fungi

You might think nothing can live beneath the sea floor, but scientists recently discovered bacteria living 1,000 feet (300m) feet below it. Found by drilling through sediment and crust, the bacteria was feeding off residue many millions of years old.


Bigfin Squid

Bigfin Squid

Looking a bit like a boat rudder, the bigfin squid was first seen off the Hawaiian coast in the mid-2000’s and has been scarcely photographed. Including its tentacles, it can reach lengths of up to 16 feet (5m) long.


Battle Snail

Scaly foot snail

Snails aren’t the first animal which come to mind when thinking about body armour, but a newly-discovered (and so yet-named) snail in the Indian Ocean uses iron compounds in the form of scales to protect its fleshy foot. The U.S. military is even researching the snail to improve its battle armour.


Hydrothermal Vent Worms

Riftia tube worm colony

Looking like long lipstick containers, hydrothermal vent worms have neither a mouth nor digestive system. They thus rely on a relationship with bacteria which use chemicals to make food the worms can absorb.


Gonatus Onyx

Gonatus Onyx

Using hooks under its arms, the Gonatus onyx squid holds onto its huge egg mass for many months at a time before they hatch. Talk about a helicopter parent!

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