Marine conservation efforts, often through top-down marine protected areas (MPAs), have typically prioritized biodiversity over the needs and rights of local communities. This approach can lead to social injustices and unintended consequences, including promoting unsustainable practices and eroding traditional, sound management methods, along with the loss of cultural heritage and identity. This food-for-thought piece explores some of these overlooked ramifications of top-down MPAs, using the Tamoios MPA in Brazil and the Danube Delta Biosphere Reserve in Romania as examples. It highlights how the exclusionary nature of top-down conservation can potentially undermine or delay conservation goals. Integrating local ecological knowledge (LEK) and customary management practices into formal management can be beneficial, regardless of potential limitations and/or disconnection with recommended conservation practices. LEK can serve as a bridge between communities and conservation goals, offering insights into sustainable practices and fostering dialogue. Inclusive approaches that combine LEK with scientific knowledge and involve local communities in decision-making can be beneficial for both new and existing MPAs, especially those that may not have been established in a socially fair way. Prioritizing negotiation and active listening in conservation efforts can help achieve both ecological sustainability and social justice, providing a potentially effective approach to marine conservation.