MarAlliance is a dynamic international non-profit organization registered as a 501c3 in California, USA, that designs and conducts collaborative grassroots research and conservation action on tropical threatened marine megafauna such as sharks, rays, turtles and large finfish. Working with fishers and other key stakeholders of the sea, we promote sustainable small-scale coastal fisheries and generate essential data on fish populations, behavior and ecology to enable fact-based conservation and management, often in the context of established or proposed marine protected areas. Through our work with fishers we promote the use of sustainable fishing methods and create economic income diversification initiatives to decrease pressures on fisheries and improve good stewardship and management practices. We delight in informing and educating students, fishers, tourism guides, decision-makers and the public at large about marine megafauna science and conservation both at sea and through more formal land-based means. Our communication strategy is broad: we share our findings and other key information at many levels, from partner communities to large public events, international congresses, social media and television.