C. fragilis

C. fragilis may refer to:
 * Campodea fragilis, a diplura arthropod species in the genus Campodea
 * Chickcharnea fragilis, a sea snail species
 * Chingkankousaurus fragilis, a theropod dinosaur species from the late Cretaceous Period
 * Citharichthys fragilis, the gulf sanddab, a fish species native to the eastern Pacific Ocean
 * Coelurus fragilis, a dinosaur species from the Late Jurassic period
 * Cystopteris fragilis, the brittle bladderfern or common fragile fern, a fern species