Pompeii worm:“This extremophile keeps a cool head even in extreme temperatures. The  Pompeii Worm finds a habitat on or near Black Smokers, hydrothermal  vents on the sea floor, which give the worm its volcanic name. Nestled  within its cozy tube, its body stays at a very toasty 175º F, while its  plume-like head protrudes from the tube into water that is a much more  temperate 72º F. Weirder still, its fleecy coat is actually a colony of  bacteria that lives in a symbiotic relationship with the worm, fed by  mucus secretions produced by the worm. Truly an oddity, the Pompeii worm  (and its living coat) obviously has a lot to teach us about living in  an extreme range of temperatures.”
http://io9.com/5317662/extremophiles-i-have-known-and-loved?comment=14298987:14299781

Pompeii worm:

“This extremophile keeps a cool head even in extreme temperatures. The Pompeii Worm finds a habitat on or near Black Smokers, hydrothermal vents on the sea floor, which give the worm its volcanic name. Nestled within its cozy tube, its body stays at a very toasty 175º F, while its plume-like head protrudes from the tube into water that is a much more temperate 72º F. Weirder still, its fleecy coat is actually a colony of bacteria that lives in a symbiotic relationship with the worm, fed by mucus secretions produced by the worm. Truly an oddity, the Pompeii worm (and its living coat) obviously has a lot to teach us about living in an extreme range of temperatures.”

http://io9.com/5317662/extremophiles-i-have-known-and-loved?comment=14298987:14299781