Celebes Rainbowfish reach lengths of up to three inches (7.5 cm) as adults. They are slow-growing fish, and take at least seven or eight months to attain full size. If you decide to breed these fish, you should set up a separate breeding aquarium filled with many salt-tolerant fine-leafed plants such as Cabomba, Milfoil, Riccia and Java Moss. The parents will scatter roughly 50-70 relatively large eggs throughout the plant leaves — and will then begin enthusiastically eating them if not removed quickly. The eggs hatch within seven days and the surprisingly tiny fry (considering the relatively large egg size) hang around and eat from the water’s surface. The young fish usually are large enough to add to the main school by the time they are five months old.