The 2019 Aquatic Sciences Meeting of the Association for the Sciences of Limnology and Oceanography (ASLO) took place February 24 to March 1 in San Juan, Puerto Rico. This biennial scientific conference brings together scientists, students, and policy-makers from around the world to present research on a variety of themes relating to aquatic sciences, including remote sensing, aquatic biodiversity, climate change, carbon cycling, and transitioning scientific research into meaningful applications.