Australian marine and coastal areas are highly valuable. More than 85% of our population live within 50 Km of the coast. But the health of Australia's coastal and marine environments are declining due to pressures such as climate change, pollution, habitat destruction and invasive species. Increasing individual participation in stewardship actions will be one part of effective management strategies. Marine citizen science experiences have potential to increase individual uptake of stewardship behaviours. However, little is understood about the relationship between different elements that make-up such experiences and the varying effects on willingness to do different stewardship behaviours. In this study We surveyed individuals (n=130) choosing to attend one of 24 marine citizen science events. Using quantitative methods, we differentiate the social and nature aspects of the marine citizen science experiences and examine how these experiences shaped individual willingness to adopt different types of stewardship behaviours.