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Pearlfish: The eel-like fish that lives up a sea cucumber's buttThis slimline, eel-like fish has no scales for protection so chooses to use a sea cucumber's sphincter for safety.
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Great white sharks split into 3 populations 200,000 years ago and never mixed again — except for one hybrid found in the Bermuda TriangleScientists found three distinct great-white-shark populations that congregate in different oceans and do not interbreed. Their separation may have implications for conservation.
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Sharks in an Italian aquarium keep having 'virgin birth' after years without malesTwo endangered female sharks found to be reproducing asexually in the absence of males in what appears to be a vital survival mechanism amid declining male populations.
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Secret of why Greenland sharks live so incredibly long finally revealedSurprising new research has revealed why the world's longest-living vertebrate, the Greenland shark, has such a lengthy lifespan. The findings could have big implications for the species' future.
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Searching for 'Makozilla' — the supersized mako sharks in the North PacificA decade after a huge mako shark dubbed "The Beast" was caught off the California coast, experts search for its enormous relatives.
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Tasselled wobbegong: The master of disguise that can eat a shark almost as big as itselfTasselled wobbegong sharks are so well camouflaged they can vanish on the seafloor, waiting for unsuspecting prey to pass before lunging forward to suck their victims into their giant mouths.
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'It's like we opened a buffet': Sharks in Gulf of Mexico learn to steal food from fishing netsSharks in the Gulf of Mexico are learning to associate boat engines with food, leading to more and more cases of depredation, experts say.
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New piranha-like fish with 'human teeth' and Eye of Sauron marking found deep within the AmazonA new species of piranha-like fish called pacu was recently found hiding in plain sight among several near-identical species in the Amazon River. Researchers have named it after Sauron from "The Lord of the Rings."
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Gigantic sunfish that washed up on Oregon beach could be the largest of its species ever foundA rare giant hoodwinker sunfish that washed ashore Gearhart beach in Oregon could be the largest of its species ever sampled.
