Ocean sunfish primarily feed on jellyfish and gelatinous zooplankton, such as ctenophores, salps, and medusae. They have also been known to eat soft bodied invertebrates, crustaceans, mollusks, seaweed, eel larvae, and even flounder (Wheeler, 1969). Ocean sunfish are thought to migrate to higher latitudes in response to zooplankton migrations during the spring and summer months (Liu et al., 2009). They may also migrate vertically during the day to prey upon jellyfish and zooplankton found below the thermocline (Cartamil and Lowe, 2004; Liu et al., 2009).
Animal Foods: fish; mollusks; aquatic crustaceans; cnidarians; zooplankton
Plant Foods: macroalgae
Primary Diet: herbivore (Algivore); planktivore