Off of Peru, the diet of Markham's Storm-Petrel consists of 54% fish, 36% cephalopods, and 10% crustaceans. Peruvian anchovy (Engraulis ringens), pelagic squat lobster (Pleuroncodes monodon) and oceanic octopus (Japetella sp.) were the most commonly consumed organisms, respectively (García-Godos et al. 2002). García-Godos et al. point out that this diet varies on a yearly basis, particularly during El Niño and La Niña events, when changes in water temperature alter availability of target prey items.