The Blue Koi Guppy is a captivating and unique variant among fancy guppies. One of its most distinct features is the iridescent blue that covers their face and the tops of their heads. This makes them stand out in pond setups where they are viewed from above. As indicated by "short body," this variant has a more compact, stocky, and rounded body compared to the elongated form of standard guppies that gives them a cute appearance. The striking combination of vibrant blues and intricate patterns makes them an undeniable showpiece in any aquarium. Guppies are one of the most popular fish in the aquarium hobby. They are gorgeous fish that come in so many different strains and colors. Like other livebearers, they need a good amount of calcium in their system, so they do best in harder water.