The Sicyopterus cynocephalus, also known as the Marquesan goby, is a beautiful and unique freshwater fish native to the Marquesas Islands in the South Pacific. With its striking blue and yellow body and distinctive black spot on its dorsal fin, this goby is a stunning addition to any freshwater aquarium. The Sicyopterus cynocephalus is a peaceful and social species that thrives in a well-planted tank with plenty of hiding spots and gentle water flow. This species is an omnivore, making it easy to feed with a varied diet of small live and frozen foods. Whether you are a seasoned fish enthusiast looking to add a rare and exotic species to your collection, or a beginner searching for a visually striking and low-maintenance fish, the Sicyopterus cynocephalus is an excellent choice.