The Red Swordtail (Xiphophorus hellerii), also known simply as the Red Swordtail, is a popular and vibrant freshwater fish cherished for its striking red coloration and elegant appearance. Size: typically grow to lengths of 6-7.5 centimeters (2.5-3 inches). Appearance: These swordtails are renowned for their brilliant and intense red coloration, which extends from their body to their distinctive sword-like tail. Their striking appearance makes them a standout in any aquarium. Behavior: Red Swordtails are generally peaceful and sociable, making them suitable for community aquariums. They are known for their active swimming and interaction with other fish. pH: 7.0 to 8.0. Temperature: 22-26°C (72-79°F). Light: They adapt well to moderate aquarium lighting, which showcases the vividness of their red coloration. Diet: These swordtails are omnivorous and enjoy a varied diet. They readily accept high-quality flakes, pellets, and live or frozen foods like brine shrimp, bloodworms, and vegetable matter.