Threaded Fin Dwarf Rainbow Fish
Threaded Fin Dwarf Rainbow Fish
Threaded Fin Dwarf Rainbow Fish
Threaded Fin Dwarf Rainbow Fish
Threaded Fin Dwarf Rainbow Fish
Threaded Fin Dwarf Rainbow Fish

Threaded Fin Dwarf Rainbow Fish

  • In stock, ready to ship
  • Inventory on the way
  • Live Arrival Guarantee
  • All our live fish, shrimp, snails are care with love and passion, when through minimum of 14 days quarantined and shipped from Splashy Fish facility in Springfield, Virginia, USA
Regular price$9.99
Shipping calculated at checkout.

This is only apply to live fish order.

Live Arrival Guarantee:

Benefit from our extensive experience in shipping live fish. In 2021, our records indicated a mere 0.5% dead-on-arrival (DOA) rate for all live fish orders, compared to the industry standard of 1.5%. These numbers translate to only 5 out of 1000 orders experiencing DOA fish.

At Splashy Fish, customer satisfaction is our priority. That's why we provide a 100% Live Arrival Guarantee on all animals shipped via USPS, UPS, or FedEx. Please note - Splashy Fish reserves the right to void Live Arrival Guarantee protection under the following circumstances:

  1. The customer has chosen USPS First Class Mail as a shipping method. 
  2. The shipping address is a PO Box address
  3. The order was refused delivery by the customer.
  4. If the order is returned to the sender for any reason. For instance, an incorrect shipping address, an undeliverable address, etc. 
  5. The order was held for pick up at USPS, UPS, and FedEx offices for longer than 24 hours after the last update on the tracking number. 
  6. The Live Arrival Guarantee claim does not include all the requirements mentioned below
  7. The Live Arrival Guarantee claim is made after the claim period mentioned below. 
  8. The animals are not in their original packaging

Live Arrival Guarantee Claim Period: 

For Live Fish and other invertebrates: one and a half hours (1.5 hours) after the posted delivery time. 

For Snails: 48 hours after the posted delivery time. 


Steps to claim Splashy Fish's Live Arrival Guarantee: 

  1. Take a picture of the shipping box and the shipping label. 
  2. For live fish and other invertebrates: Please provide two pictures of each bag (containing the dead fish) upon arrival. Ensure the images display the bag in its original, unopened condition with the original rubber band intact
  3. For Snails: Position the snail in one corner of the tank. If the snail does not move within 48 hours, please take several pictures of the snail's opening
  4. Send an email to with the subject line: DOA and Your Order Number, or message us on social media.
  5. In the body of the email, include your tracking number.
  6. The claim must be sent within the claim period mentioned above.

After submitting the required information, please allow us 1-3 business days to determine the cause of the issue. If the claim is valid and approved by our team, you will

  • Receive a store credit for future purchases, excluding the shipping cost, of the dead-on-arrival fish 

If the Live Arrival Guarantee claim does not meet all listed requirements, Splashy Fish reserves the right to reject it. 

Shipping live animals and plants is a complex process, and temperature plays a crucial role in ensuring the safe and secure delivery of your order.

If the highest daytime temperature in your location and the lowest nighttime temperature here in Springfield, Virginia—where our facility is situated—fall below 40°F or exceed 90°F, we will proactively delay your order. This measure is taken to prioritize the well-being of the animals and plants.

For the safety of our living cargo and to protect your investment, we retain the right to suspend shipping as necessary due to extreme weather conditions. Our Splashy Fish team will assess the situation and determine if it is unsuitable to ship, considering the safety of the animals.

To stay informed or address any questions or concerns, feel free to reach out to our dedicated Splashy Fish Support team via email at

Once our team prints and packs your order, we'll notify you via email. This notification will include your tracking number and the expected arrival day. If you opt for UPS 2 Day shipping, your package should arrive within 2 days after shipment. Similarly, if you choose UPS 1 Day, your order will reach you the day after it is shipped. In the case of orders containing only plants or dry goods, they may be shipped via USPS, provided that this is the selected shipping option during checkout.

We ship all of the customer orders from our warehouse located in Springfield, VA. We pack and ship our orders depending on the orders with the exception of someday we cannot ship out live fish.

All Live Fish orders will be shipped out on Tuesday and Wednesday each week for overnight shipping by UPS.

Monday to Saturday:  We will pack and ship out all orders that do not contain live fish. 

Sunday: (Splashy Day) Today is the day we let our hard-working team members and our fish to destress and ready for the following week's shipment.

For more information regarding about shipping please visit us our Shipping Policy and Schedule

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The male Threadfin Rainbowfish (scientific name: Iriatherina Werneri) highlighting itself with the very long elaborate rear fins is surely a welcomed inhabitant to any community, especially planted aquariums.

Threadfin Rainbowfish is a widely-traded species, indigenous to densely planted rivers and streams with slow-moving currents in New Guinea and Australia. They prefer dwelling in mature and less turbulent aquariums with warm temperature and soft and slightly acidic water. The peaceful species often stays in the middle and upper areas of aquariums and is known for jumping occasionally. Although it is quite pleasing to observe, such behavior should be discouraged to avoid them jumping out of the tank. The most common and highly recommended method for solving this issue is using floating plants (such as hornwort and duckweed) to cover the water surface. It kills two birds with one stone as it provides the aesthetic view in addition to resembling Threadfin Rainbowfish’s natural habitat.

Threadfin Rainbowfish is a shoaling species and should be kept in a group of at least 6 specimens. It not only encourages them to be active but also displays the optimal coloration when they swim together. If you want to keep them with your other fishes, Threadfin Rainbowfish will find it alright and be nice to their new friends, so long as they are bottom-dwellers or not aggressive or fin-nipping ones. 

When it comes to diet, Threadfin Rainbowfish is not picky at all. They accept most of the commercial fish foods that you can easily find in any fish store. Only one thing you should notice is they are undoubtedly outcompeted for food. Thus, make sure you provide them with sufficient food and see them finish it totally. 

What You Can Expect From This Fish:

  • Peaceful and hardy disposition
  • Interesting long thin fins 
  • Safe with plants


  • Temperature: 77° - 86°F (25° - 30°C)
  • pH: 5.5 – 7.0
  • GH: Soft
  • Minimum tank size: 10 gallons or more


  • Diet: Flake food, micropellets, small frozen foods such as daphnia, cyclops, and baby brine shrimp
  • Social behavior: Peaceful, shoaling
  • Origin: New Guinea, Australia
  • Average adult size: 1.2 - 1.6 inches (3-4 cm)
  • Average purchase size: 1 inch (2.5 cm)

See more details about care guide for Threadfin Rainbowfish here.

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