Aquaculture production is growing exponentially as global population increases even while fisheries landings stagnate. Large scale aquaculture has the potential for both negative and positive effects on coastal ecosystems. Aquaculture of seaweeds and shellfish, has been suggested to be a productive method of bioremediation of nutrient pollution and local ocean acidification. Integrated Multi-Trophic aquaculture (IMTA) attempts to use ecosystem-like flows to produce food, reducing negative environmental impacts attributed to intensive fin fish aquaculture. The addition of large populations of single or multiple cultured species and the associated infrastructure to coastal ecosystems potentially effects wild species, nutrient cycles, flow and habitat of other species in coastal ecosystems. For this session, we invite presentations on any aspect of ecosystem services or ecosystem impacts of coastal aquaculture. The session topic is directly relevant to UN Sustainable Development Goal 14: Conserve and Sustainably Use the Oceans, Seas and Marine Resources. We expect the session will be an opportunity to share research addressing the direct and indirect ecosystem effects of aquaculture with the view toward increasing sustainability of natural and aquaculture systems.