Rainbow fish are beautiful! They come in many different colors and can create a beautiful school of color in community aquariums. They generally reach about 4.5-5 inches and should be kept in groups of six or more. We recommend 40+ gallons. They are peaceful and are usually kept with other community fish around their same size. Some examples are angelfish, large tetras, Plecos or Cory catfish. All pictures shown are for illustration purposes only. Actual products may vary due to natural variation with livestock.