Lebistes, also known as guppies, are small freshwater fish that are popular pets for aquarium enthusiasts due to their bright colors and active nature. Some synonyms for the word lebistes include rainbow fish, grass guppy, and millions fish. These terms describe various species and subspecies of guppies, which can have different colorations and patterns. Other synonyms for lebistes may include tropical fish, ornamental fish, and livebearers, which are broader terms that encompass various species of small, colorful fish that are kept in aquariums. No matter what synonym is used, these small and colorful fish are a popular choice for hobbyists looking to add some life and color to their aquatic displays.