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Beautiful rainbowfish
✅ Level: Easy — a graceful, small rainbowfish with strikingly long fins.
The Threadfin Rainbowfish (Iriatherina Werneri), also known as the Threadfin Rainbowfish, is a tiny rainbowfish with strikingly long, graceful fins in the male. Active, colourful, and a beautiful addition to a nano or community aquarium.
🐠 Animal specifications
| Max. length | ±5 cm |
| Temperature | 24–29°C |
| pH | 6.0–8.0 |
| Min. aquarium length | 60 cm |
| Diet | Omnivore |
| Min. school size | 6 pieces |
| Breeding behaviour | Egg layer |
| Origin | Australia |
| Family | Melanotaeniidae |
| Difficulty | ⭐ Easy |
🏪 Collection & warranty
- Only available for collection at our store in Heinkenszand — this animal is not shipped
- Feel free to inspect the fish carefully in the store when collecting
- Feel free to ask for advice on care or aquarium composition when collecting
✂️ Care
Keep in a school of at least 6 in a well-planted aquarium. The graceful, long fins of the male are best displayed in a calm environment without fin-nipping species.
🐠 Combination tip
Peaceful and ideal for nano aquariums, along with other small, peaceful schooling fish or shrimp.
❓ Frequently asked questions
Why does this fish have such long fins?
The graceful, thread-like fins are a characteristic of the male and serve, among other things, for display during courtship.
How many specimens should I buy at minimum?
At least 6 pieces — as a schooling fish, it feels most comfortable in a group.
Is this fish suitable for a nano aquarium?
Yes, due to its small size, the Threadfin Rainbowfish is excellently suited for nano aquariums.
Do you have another question? Feel free to visit our store — we are happy to help you make the right choice for your aquarium.
