From JAMSTEC: Scaly foot–a spiral gastropod clad in iron sulfide scales
Found only in an extremely limited region of hyrdothermal areas within the Indian Ocean, which is called “Kairei Field”. As the name suggests, this creature is covered in rugged scales that protect it from predators. How it actually creates its iron sulfide scales, however, is not yet fully understood. A JAMSTEC research team succeeded in observing the creature in an onboard tank for the first time in February 2006. You can download my paper on this species for free here.