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Mangrove leaf slug: The solar-powered mollusk that gobbles up sunlight then goes months without eatingThis frilly slug lives in the mangroves of southeastern Asia and Australia, lounging in shallow pools of water and scraping up algae from which it gains the ability to photosynthesize.
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Green-banded broodsac: The brain-hijacking parasite that creates disco zombie snailsThis parasitic worm crawls into the eyestalks of snails, takes over its brain then pulsates to make the mollusk look like a dancing caterpillar.
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Watch ghostly dumbo octopus swim with its massive 'ears' in rare new footageOn an expedition in Hawaii, a remote underwater vehicle filmed a dumbo octopus swimming with its ear-like fins near the seafloor. The pale white creature is one of the deepest-dwelling octopuses on Earth.
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See extremely rare photos of alien-looking '7-arm octopus' spotted near Washington coastThe seven-arm octopus, which actually has eight arms, is one of the largest octopus species and is rarely seen by people because it normally dwells in the deep sea.
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Watch elusive, sucker-less squid in rare footage captured off the GalapagosFootage of the rare squid, Grimalditeuthis bonplandi, was captured for only the 2nd time ever during an expedition to explore hydrothermal vents off the Galapagos Islands.
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Watch a see-through squid with demon-like eyes swim in Alaska's deep watersThe see-through cephalopod was spotted by researchers exploring the deep sea surrounding Alaska's Aleutian Islands.
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Blue-ringed octopus, one of the most toxic animals on Earth, bites woman multiple timesAn unnamed woman was bitten twice by a blue-ringed octopus, which contains one of the most dangerous neurotoxins on the planet, but she escaped relatively unharmed.
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Diver captures stunning photos of rare 8-foot giant squidDiver Yosuke Tanaka swam with a giant squid in the Sea of Japan near Toyooka City in Hyogo Prefecture.
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What is the largest squid in the world?There are two contenders for the world's largest squid, and both are giants.
