Clown Killifish (Epiplatys annulatus) The Clown Killifish is one of the most charming and colorful nano fish in the freshwater aquarium hobby. Also known as the Rocket Killifish due to the elongated rays of the male's tail, this tiny surface-dwelling species features bold black vertical bands, a golden body, and brilliant red, blue, and yellow accents on its fins. Its unique appearance, peaceful nature, and fascinating behavior make it a favorite for planted nano aquariums. Native to the slow-moving streams, swamps, and forest pools of Sierra Leone, Guinea, and Liberia, Clown Killifish inhabit calm, heavily vegetated waters with abundant floating plants. In the aquarium, they spend most of their time near the water's surface, making floating plants and gentle water movement especially important. A tightly fitting lid is essential, as these tiny fish are accomplished jumpers. Clown Killifish thrive in mature, densely planted aquariums with stable water conditions and subdued lighting. Their small mouths require tiny foods such as baby brine shrimp, microworms, daphnia, frozen cyclops, and high-quality micro pellets or crushed flakes. A varied diet helps maintain their vibrant coloration and encourages natural spawning behavior. These peaceful fish are ideal companions for other nano species such as small rasboras, Ember Tetras, pygmy Corydoras, otocinclus, and freshwater shrimp. Their calm disposition and preference for the upper levels of the aquarium make them an excellent addition to well-planned nano community tanks. Scientific Name: Epiplatys annulatusCommon Name: Clown Killifish / Rocket KillifishCare Level: ModerateTemperament: PeacefulDiet: Carnivore (Micropredator)Adult Size: Up to 1.5 InchesMinimum Tank Size: 10 GallonsOrigin: Sierra Leone, Guinea & Liberia If you're looking for a unique nano fish with vibrant colors and fascinating surface-dwelling behavior, the Clown Killifish is an outstanding choice. Its striking pattern, peaceful personality, and suitability for planted aquariums make it one of the most rewarding fish for nano aquarium enthusiasts.