A. fragilis may refer to:
Acronicta fragilis, the fragile dagger moth, a moth species found from Newfoundland to Florida Actinodaphne fragilis, a plant species endemic to Malaysia Aglaia fragilis, a plant species endemic to Fiji Allosaurus fragilis, a large theropod dinosaur species that lived 155 to 145 million years ago during the late Jurassic period Anguis fragilis, the slowworm or blindworm, a limbless reptile species native to Eurasia Apogon fragilis, a cardinalfish from the Indo-West Pacific Argonauta fragilis, a pelagic octopus species Ascobulla fragilis, a sea snail species Atalacmea fragilis, a sea snail species Atrina fragilis, the fan mussel, a large saltwater clam or marine bivalve mollusc species
See also Fragilis (disambiguation)