Marine Biology Which worm has 10 hearts? March 10, 2026 by Myaya | Leave a Comment The Osedax worm, also known as the "bone-eating worm" or "zombie worm," is the fascinating creature renowned for possessing multiple hearts, with estimates suggesting it has around 10 hearts. These unique marine annelids lack a mouth and digestive system, instead relying on symbiotic bacteria to break down the bones of whale carcasses. Unraveling the Mystery […] Read more ยป