Spyvalve uses bivalves to spy on aquatic environments by attaching sensors
to each opposing valve. The sensors measure the amount of electromagnetic energy
between the valves. When the shell is closed, the magnet is at is closest to the
sensor and the amount of magnetic energy is at its greatest. In contrast, when
the shell is open the magnetic energy recieved by the sensor is far less. The data are then
uploaded to the network in real time. Under normal conditions, bivalves rarely close for longer than a few
When all bivalves at a location remain closed for a period of time, an alert is raised for that location.