The oxidative stress damage on cells is an example of roles in the pathogenesis of different degenerative diseases and the search of compounds that can slow this oxidation is continuous. The aim of this work was to obtain bioactive fractions from wild shrimp (Litopenaeus stylirostris) muscle, in order to evaluate their protective capacity and chemo-structurally characterize them. ABTS and DPPH, and FRAP assays suggested that bioactive fractions possess free radical-scavenging capacity, and reducing power, respectively. An inhibitory effect observed on AAPH-induced hemolysis and results from an H2O2-derived radicals-scavenging assay (retinoprotective) suggest that these fractions can exert their protective activity in human cells. UV-Vis, fluorescence, C-13-, H-1-NMR, and ESI-MS studies performed on the most bioactive fraction, suggests that their main components are eicosapentaenoic acid, dioctyl phthalate, and a possibly novel indolocarbazole alkaloid derivative. These results suggest that these compounds are good candidates to further investigations as possible chemoprotective agents.