A model of fish in a pond eating algae. Choose one of the Create Fish buttons, then Run to run the simulation.
Create Any Color Mating Fish: When fish contact each other and reproduce, there is a 50% chance of the offspring having the other parent's color. Both contacting fish can attempt to produce an offspring. Note that just like the Multi-Trait fish from the original simulation, the different colored fish have different energy requirements for producing offspring.
Create Same Color Mating Fish: Works the same as above, but fish will only produce offspring with other fish of the same color.