C. glaucus

C. glaucus may refer to:
 * Callistemon glaucus, a shrub in the myrtle family
 * Caulanthus glaucus, a plant in the mustard family
 * Chiton glaucus, the green chiton
 * Coluber glaucus, now Bothrops lanceolatus, the fer-de-lance snake
 * Conus glaucus, a species of cone snail
 * Craugastor glaucus, a species of frog