In the Virtual Tank, there is a large array of colored guppies; 30 plus a rainbow guppy. Colored guppies are identical in physical features and behavior as regular guppies but are priced at 500 shells instead of 25 due to their unique color variations. These guppies (when at medium size or large size) will produce silver shells and gold shells instead of coins. Unlike regular guppies, they cannot grow to be kings, so they cannot drop blue shells.