O. gracilis
O. gracilis may refer to:
- Obruchevichthys gracilis, an extinct tetrapod species from Latvia during the Late Devonian
- Oceanites gracilis, the Elliot's storm-petrel, aseabird species
- Oedipina gracilis, a salamander species found in Costa Rica and Panama
- Omphalotropis gracilis, a gastropod species endemic to Guam
- Ophiosaurus gracilis, the Burmese glass lizard or Asian glass lizard, a legless lizard species
- Ormosia gracilis, a legume species found only in Malaysia
- Oxyopsis gracilis, the South American green mantis, a praying mantis species
See also