Red Rainbowfish
The red rainbowfish is one of the larger rainbow species, growing to about four inches. Males develop a deep red color, while females have a solid copper hue. These are schooling fish and we recommend keeping at least one male and one female to ensure their well-being. We cannot sell male-only sets, as this would lead to overcrowded tanks with only females, which are not commonly requested.
Unfortunately, in their native habitat in Indonesia, red rainbowfish are threatened due to habitat loss caused by human overpopulation. However, they are successfully bred in Asia and Florida and are widely available in the aquarium trade. They are also known as Red Irian Rainbow or Red Millennium.
| Feature | Detail |
|---|---|
| Size | About 4 inches |
| Gender | Male: deep red; Female: solid copper |
| Behavior | Schooling fish; require at least one male and one female |
| Origin | Indonesia (native), bred in Asia and Florida |
FAQ
Can I buy only male red rainbowfish?
No, we cannot sell male-only red rainbowfish. We require at least one male and one female to maintain a balanced and healthy school.
What is the typical color of female red rainbowfish?
Female red rainbowfish have a solid copper color.
Are red rainbowfish native to Indonesia?
Yes, red rainbowfish are native to Indonesia, though their natural habitat is under threat due to human activity.

Maria Bell –
I bought a pair of red rainbowfish and they’ve been active and colorful since day one. The male is vibrant red and the female has a nice copper tone. They swim together in a group, which makes the tank lively. I appreciate that the store requires both genders for a balanced setup.
Neil MacDonald –
The fish arrived healthy and seem to be adjusting well. I was happy to get both a male and female. They don’t stay still — they swim in a school, which adds movement to the tank. A bit of care is needed, but they’re a great addition.
Kylie Payne –
I’ve had red rainbowfish for three months now. They’re active, peaceful, and very attractive. The color contrast between male and female is striking. I didn’t expect such a lively display in a small tank.