O. fragilis
Introduction '''''O. fragilis''''' may refer to:* ''Omphalotropis fragilis'', a gastropod species endemic to Micronesia* ''Ophiothrix fragilis'', an echinoderm species in the genus ''Ophiothrix''* ''Opuntia fragilis'', the brittle prickly pear or little prickly pear, a cactus species  native to much of North America
See also * Fragilis (disambiguation)