Forktail Blue-Eye Rainbowfish (Pseudomugil furcatus) – 2–2.5 inch Moenkhausia copei primarily hiding during the day

primarily hiding during the day and active at night

Group Behavior: Shoaling fish—best kept in groups of at least six to support natural social behavior and coloration

Generally semi-aggressive and territorial

moderate hardness (KH 4–8)

Forktail Blue-Eye Rainbowfish (Pseudomugil furcatus) – 2–2.5 inch Moenkhausia copei primarily hiding during the daySpecies Overview The Forktail Blue Eye Rainbowfish (Pseudomugil furcatus) is a small, vibrant freshwater species native to the coastal streams of Papua New Guinea. It features striking turquoise blue eyes, a silvery body, and a distinctive forked tail. Males display bright yellow fins, especially during breeding, making them a colorful addition to any community tank. This peaceful species is active and schooling, best kept in groups. Aquarium Setup &