Medically reviewed by Bryan M. Wolynski, OD Key Takeaways Watery eye mucus often comes from a virus and is linked to pink eye.  Thick green or gray mucus can mean a bacterial infection needing ...

Sea sponges “sneeze” in slow motion to get rid of the sand and pollutants that they suck into their bodies, and the expelled mucus may be an important food source for other marine organisms. Taking up ...