Question: how big do australian rainbow fish get?
Answer: Australian rainbowfish reach maximum lengths of 11 cm (4.3 in), but the males are usually no larger than 8.5 cm (3.3 in), while the females usually only grow to 7 cm (2.8 in). The body is elongated, with a small head and large eyes. Australian rainbowfish have two dorsal fins and a pointed anal fin.