Mature adult Ghost Knife Fish These nocturnal fish grow large, reaching around twenty inches (fifty one cm), they will need a sizable aquarium with Area to maneuver. You’ll normally come across them inside the shops as juveniles only 4 inches, so in that case you have enough time to update https://www.scribd.com/document/680551536/What-are-the-Pros-and-Cons-of-Keeping-Discus-Fish