Iron Snail: Mother Nature's Steampunk...

The scaly-foot gastropod (Crysomallon squamiferum)...  ...t live in the foot of black smokers at the Kairei hydrothermal vent field, with temperatures reaching 725 °F, it...  ...miles below the central Indian Ocean, deep within hydrothermal vent fields. Fluids in these vents...

http://www.neatorama.com/2010/02/11/iron-snail-mother-natures-steampunk/