The American lobster Homarus americanus supports the single most important fishery in Canada. In NB, where there are approximately 1,460 independent license owners, the annual value of lobster landings has increased markedly over the last 30 years, and particularly since 2010, when it averaged $189M and accounted for 61% of the value of all marine fisheries in the province. To this must be added other significant economic (not to mention social) benefits of the industry, such as those related to transformation and exports; for example, in 2018, NB exported $734M worth of lobster to the US, and $16M to the growing market in China. In this project, we will use cutting-edge technology and a novel modeling approach to quantify, in greater detail than ever before, the movements of adult lobsters in nature. We will attach archival satellite tags to adult lobsters in the Bay of Fundy/Canadian Gulf of Maine, which will record the daily temperature and depth experienced by these animals over different seasons of the year. The data will then be combined with model-derived bathymetry and temperature data of the study region to reconstruct, using a maximum likelihood approach, the seasonal migrations and movement tracks of these animals. We recently demonstrated the feasibility of this work in a preliminary study. This project will generate the most detailed information to date concerning benthic movements of adult lobsters in nature, as well as a new tool to study these movements as they continue to be affected by a changing climate.