The following gives a general picture of the EUZONE system in action.

The EUZONE interface has several pop-up windows for defining system parameters. These include physical and chemical parameters such as the grid size, depth of thermocline, redfield ratio, nitrate half-saturation constants, photosynthesis and respiration rates (and many many more) as well as life-history parameters such as age of maturation, parental biomass contribution to children, etc.. Control parameters for the genetic algorithm (GA) and genetic program (GP) can also be set, as shown in the slide above.

During a EUZONE run, the plankton "clouds" are color and figure coded to reflect their activities. Grid cells are also color coded to reflect their relative concentrations of one of several quantities: nitrate, oxygen, chlorophyll, irradiance, etc. The user can also define probes of various quantities and relationships. Probe results are written to files but can also be viewed during the simulation, as shown on the right. Simulation states can also be saved to a file such that the entire simulation can be replayed as movie. Hence, the user has the option of viewing the simulation as it happens or running the simulation without graphics and then viewing the results later. The latter approach allows us to simulate on machines that do not support the graphic interface. 

The EUZONE interface also enables the viewing of particular plankton clouds. This enables checking of the physical, chemical and biological variables and parameters associated with each cloud, as well as the lisp code for a cloud's genetic program (displayed as a tree).