In the guppie simulation, what happens to the brightest guppies when there are large numbers of predators?

In the simulation, the brightness of the guppies is directly related to how fast they are consumed by predators. This phenomenon is explained simply and reflects natural selection. The brighter guppies are at a selective disadvantage due to the ease with which predators are able to spot them. The darker colored guppies are able to avoid predator better so they live fore a longer time.