The Australian Animal Tracking and Monitoring System (AATAMS) is part of the Integrated Marine Observing System (IMOS), a national, collaborative research infrastructure program. IMOS brings together universities and publicly funded research agencies working in marine and climate science with an over-arching principle of publicly available data. IMOS supports eleven research infrastructure facilities that generate data streams covering five strategic research themes, including climate variability and biological responses. AATAMS supports a national acoustic tracking and monitoring network covering a wide array of marine species in pelagic, coastal, and estuarine ecosystems. <br /> The AATAMS national database is a repository and data storage facility built through collaboration between the IMOS-AATAMS community with each project providing information on temporal and spatial movements of tagged species; together with sensor transmitters collected data can also provide insights into animal behaviour. Currently, the database incorporates 175 researchers from 34 organisations that have deployed receivers at over 2000 locations nationwide. More than 4000 individually identified animals have been tagged generating over 60 million tag detections. The collated information is accessed through a web application interface and through the IMOS Ocean Portal. The AATAMS database provides ready access to individual projects, tagged species, receiver locations, and spatial and temporal movements of marine species. The IMOS Ocean Portal connects this stream of information with those of the other research facilities so that the biological data can be related to a wide array of oceanographic data. <br /> This information builds the foundation for putting each acoustic telemetry project's research question into perspective, providing the tools in which the bigger picture of a species' biology and ecology as well as an ecosystem's function may be investigated. Applications are diverse, including monitoring of animal behaviour, migration patterns, predator-prey relationships, marine park monitoring, and long-term monitoring of climate change. This ocean observation platform will be pivotal in defining how aquatic management practices and policy decisions evolve.