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Celebes Rainbowfish: A Comprehensive Care Guide

Celebes Rainbowfish: A Comprehensive Care Guide

The Celebes Rainbowfish (Telmatherina ladigesi) is a graceful and distinctive freshwater fish known for its slender body, shimmering silver coloration, and striking yellow and black fins. Native to the island of Sulawesi in Indonesia, this species stands out from other rainbowfish with its elongated fins and elegant swimming style.

Celebes Rainbowfish are peaceful schooling fish that do best in groups and are an excellent choice for planted community aquariums. Their unique appearance and active behavior make them a favorite among aquarists looking for something a little different from the more common rainbowfish species.

Natural Habitat and Distribution

Celebes Rainbowfish are native to Sulawesi, Indonesia, particularly around Lake Towuti and nearby waterways.

In the wild they inhabit:

  • Clear streams and rivers

  • Lakes with moderate water movement

  • Areas with aquatic vegetation and rocky substrates

These habitats typically feature warm, stable water conditions and plenty of open swimming space.

Tank Size

Minimum tank size: 20 gallons
Recommended tank size: 30 gallons or larger

Celebes Rainbowfish are active swimmers and should be kept in groups of at least 6 fish. Larger groups often produce better coloration and more natural schooling behavior.

A longer aquarium works best because it provides more room for these fish to swim together.

Water Parameters

Celebes Rainbowfish are relatively adaptable but prefer stable, clean water conditions.

Temperature: 75–82°F
pH: 7.0–8.0
Hardness: moderately soft to moderately hard

Size: 2.5–3 inches (6–7.5 cm) total length

Good filtration and regular water changes help maintain the clear, oxygen-rich water these fish prefer.

Aquarium Setup

A well-planted aquarium works very well for Celebes Rainbowfish.

Recommended tank features include:

  • Live plants

  • Open swimming areas

  • Driftwood or rock structures

  • Moderate water flow

They appreciate a balance of plant cover along the edges of the aquarium with open water in the center for schooling.

Bright lighting can help enhance their subtle iridescent coloration.

Diet

Celebes Rainbowfish are omnivores and accept a wide variety of foods.

In the aquarium they will readily eat:

  • High-quality flakes

  • Small pellets

  • Frozen foods such as brine shrimp, daphnia, or bloodworms

  • Small live foods

Providing a varied diet helps maintain their health and encourages their best coloration.

Behavior and Temperament

Celebes Rainbowfish are peaceful schooling fish that spend most of their time swimming in the middle and upper levels of the aquarium.

Common behavioral traits include:

  • Active midwater swimming

  • Peaceful interactions with other fish

  • Males displaying their fins to attract females

Their elegant swimming style and elongated fins give them a unique look compared to most rainbowfish.

Tank Mates

Because of their peaceful nature, Celebes Rainbowfish do well in community aquariums.

Good tank mates include:

  • Tetras

  • Rasboras

  • Corydoras

  • Small peaceful gouramis

  • Other peaceful rainbowfish species

Avoid aggressive fish or fin-nipping species that may damage their long fins.

Breeding

Celebes Rainbowfish are egg scatterers similar to many rainbowfish species.

Breeding tips include:

  • Eggs are typically laid among fine-leaved plants or spawning mops

  • Spawning often occurs early in the morning

  • Adults may eat eggs if given the opportunity

Fry can be raised on infusoria and later baby brine shrimp as they grow.

Fun Facts

  • Celebes Rainbowfish are sometimes called Celebes Sailfin Rainbowfish because of their long, elegant fins.

  • They belong to a different genus than most rainbowfish commonly kept in aquariums.

  • Mature males often develop longer fins and stronger coloration than females.

Conclusion

The Celebes Rainbowfish is a beautiful and unique species that adds elegance and movement to community aquariums. Their slender bodies, flowing fins, and peaceful temperament make them a great choice for planted tanks and aquarists looking for something slightly different from the more common rainbowfish species. With proper care and stable water conditions, these fish can thrive and become a striking centerpiece in a freshwater aquarium.

Looking to Add Fish to Your Aquarium?

If you're looking to add new fish to your aquarium, we recommend purchasing from trusted retailers known for their healthy livestock and excellent selection. The Wet Spot Tropical Fish has one of the best selections of rare and high-quality freshwater fish in the hobby, with excellent shipping and consistently healthy stock. Moonlight Aquatics is another fantastic source, especially for uncommon species and great prices on unique fish you don’t see everywhere. If you’re looking to add shrimp to your tanks, Buy Pet Shrimp specializes in hardy, well-bred freshwater shrimp that ship safely and arrive in great condition.

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