H. gracilis may refer to:
Haopterus gracilis, an extinct pterosaur species from the Barremian-Aptian-age Lower Cretaceous Yixian Formation of Liaoning, China Harttia gracilis, a catfish species Hemaris gracilis, the hummingbird moth or slender clearwing Hemidactylus gracilis, the graceful leaf-toed gecko, a gecko species found in India Hemigrammus gracilis, a tetra species found in Brazil Herpomyces gracilis, a fungus in genus Herpomyces Heterophasia gracilis, the grey sibia, a bird species found in China, India and Myanmar Hetschkia gracilis, a spider species found in Brazil Homalia gracilis, James in Peck, a moss species in the genus Homalia Horsfieldia gracilis, a plant species found in Brunei and Malaysia Hydrangea gracilis, a flowering plant species native to China Hymenocephalus gracilis, the graceful grenadier, a rattail species
Synonyms Hesperilla gracilis, a synonym for Anisynta cynone, a butterfly species found in New South Wales, Victoria and South Australia Hylodes gracilis, a synonym for Batrachyla leptopus, a frog species found in Argentina and Chile
See also Gracilis (disambiguation)