Coral

Coral, theoretically a bio-assimilating implant material, has been discussed as an implant material for truly permanent implants. The theory is that your body will calcify the coral, replacing it with its own tissue, essentially making the implant a permanent part of your body. There are also other materials that have similar properties (ever seen the rat with the human ear growing out of its back?). It is important to note that this is relatively advanced on a biomaterials level and should not be experimented with lightly.

Note that, contrary to urban legend, The Enigma's horns are not made of coral or bone — they are Teflon domes.

Coral can be used for body jewelry—generally plugs, tunnels and beads (for CBRs).