Blue ring

Bluering, blue ring, blue-ringed may refer to:

Products

 * Blue Origin Blue Ring, an orbital tug spacecraft
 * 8 cm Granatwerfer 34 Blauring (8-cm mortar grenade 1934 "Bluering"), a WWII German infantry mortar

Animals

 * Bluering angelfish (Pomacanthus annularis)
 * Blue ring danio (Danio tinwini sp. Blue Ring), the Blue Ring, a breed of danio goldfish
 * Blue-ringed octopus (genus Hapalochlaena)
 * Blue-ring topsnail (Calliostoma annulatum)

Other uses

 * Blue Ring of Power, a fictional DC Comics power ring for the Blue Lantern Corps