Archival tags may prove to be a significant source of critical information necessary to promote a comprehensive management plan for tarpon throughout their migratory range. The PAT (pop-up archival transmitting) tag is an instrument that is designed to be towed by a tarpon for a preprogramed time period, which may be up to two years, after which the tag automatically releases itself from the animal, floats to the surface, and transmits its recorded data to an orbiting Argos satellite.  These tags are approximately 6” long x 1 ½” in diameter and contain sensors, memory chips and transmitters. They are attached to the tarpon high on the back behind the head.  These tags are set to record temperature, water depth and locations at various times during any given day.