We successfully demonstrated a transmitter with intelligent ON/OFF mechanisms and quasi-location awareness. The prototype transmitter has (1) the ability (RF-enabled ON/OFF) to turn the tag on and off when it passes through a PIT antenna (i.e. installed at a hydroelectric dam); and (2) the ability (Salinity-enabled ON/OFF) to discern significant salinity changes (i.e. from freshwater to sea water and vice versa) and turn itself off and on, respectively.Such a device would greatly enhance the capabilities of the JSATS or other acoustic telemetry-based fish tracking systems by: (1) significantly extending the monitoring period for both anadromous and catadromous aquatic species, which could be up to their entire life cycles; and (2) introducing the quasi-location-aware functionality to acoustic tags, which, if combined with data-archiving sensor tags such as PNNL's Lab-on-a-fish that is currently in development, would enable users to associate the sensor data with specific aquatic locations and potentially gain insight on fish behavior characteristic to individual habitats.