Between 1898 and 1923, a series of disputes erupted among fishing communities in the British Gold Coast Colony (modern-day Ghana) following the introduction of larger and more productive sea fishing nets. All along the coast, fishers debated the environmental and economic consequences of adopting the nets, which debates shifted across African and colonial forums. Focusing on these disputes, this article interrogates the ways in which sites of fishing innovations and experimentation became sites of intense conflict and negotiation throughout the Gold Coast Colony as different groups debated and contested technological change. In the process, voices advocating for caution within the fishing industry were effectively marginalised through the manoeuvring of net advocates while the introduction of colonial arbitration within the realm of fisheries offered new challenges to the authority of African leaders within the marine space.