H. rubra

H. rubra may refer to:
 * Haliotis rubra, the blacklip abalone, a large edible sea snail species
 * Halocaridina rubra, the ōpae ula in Hawaiian, a small shrimp species
 * Hypotrix rubra, a moth species found from south-western New Mexico and south-eastern Arizona
 * Hyunsoonleella rubra, a marine bacterium