A light sequence generation system is provided on human associated aquatic objects such as surfboards, boogie boards, and kayaks to deter shark attacks. Light sources such as light emitting diodes (LEDs) are configured to emit sequences of pulses in arrangements and/or patterns that are unnatural to sharks. Batteries and/or capacitors may be used along with solar panels to power the light sources. The batteries and/or capacitors can also power electromagnetic repellents or may be completely shield to prevent attractant effects. The unnatural light sequence generation system can be used in conjunction with other chemical and electromagnetic repellents.