C. cookei may refer to:
Cibicidoides cookei, a foraminiferan in the family Anomalinidae Collybia cookei, a species of fungus in the family Tricholomataceae, known from Europe, Asia, and North America Conus cookei, an extinct species of cone snail Crystallodytes cookei, the South Pacific sandburrower, a fish in the family Creediidae