Otolith Cod Ear Earring Studs

 Otolith (Cod Ear) Earring Studs with stainless steel posts.

Otoliths are  "Earbones" in a cod fish, located behind the ears, composed of calcium carbonate.  They let the fish know how to swim level and change course.  They are used as gravity, balance, movement, and directional indicators in all vertebrates.