Watch as vibrant guppies meet the majestic betta fish in this exciting aquarium encounter! From their stunning colors to ...

In the second simulation, you've again stocked your pool with about one hundred guppies, but this time you start the test with an even mix of all four guppy types (brightest, bright, drab ...

In the first simulation, you've stocked your pool with about one hundred guppies, all of which are very drab in coloration at the beginning of the test. In the same pool you've placed about 30 ...