Carukia barnesi is a small highly venomous species of box jellyfish, often associated with human hospitalisations and fatalities of irukandji syndrome. However this species remains poorly understood as they are logistically difficult to collect and thus research is lacking. Recent advancements in research now enable us to induce metamorphosis from the polyp to medusa stage of this jellyfish, however lack of knowledge into their feeding ecology is preventing successful rearing attempts in aquaria. The discharge of nematocysts (stinging organelles) in some jellyfish have been shown to be light mediated, and some Cubozoan species display marked behavioural responses to different light wavelengths. In an effort to promote feeding, we developed trials to determine if changing wavelengths of light affected swimming and prey capture in infant Carukia barnesi medusa. We found considerable differences in swimming pulse rates in relation to light wavelengths of red, blue, UV and total darkness, which we compare to the recorded capture of prey when exposed to these same light treatments. By analysing the role of visual cues in this jellyfishes feeding ecology we hope to incite feeding responses to allow aquarium rearing, which would subsequently supply and facilitate venom research into this understudied jellyfish.