Can Celebes Rainbowfish and Florida Flagfish Live Together?

🟢Ideal Tank Mates

Yes, Celebes Rainbowfish and Florida Flagfish are ideal tank mates. Both species share compatible water parameters and peaceful temperaments, making them well-suited for a community aquarium. A minimum tank size of 90 litres is recommended.


At a Glance

Celebes Rainbowfish

Marosatherina ladigesi

Florida Flagfish

Jordanella floridae

🐠Family Group
Celebes Rainbowfish
Rainbowfish
Florida Flagfish
Killifish
Temperament
Celebes Rainbowfish
Peaceful (2/10)
Florida Flagfish
Semi-Aggressive (5/10)
Temperature
✓ Compatible
Celebes Rainbowfish
22–28°C
Florida Flagfish
18–26°C
pH Range
✓ Compatible
Celebes Rainbowfish
7–8.5
Florida Flagfish
6.5–8.5
Hardness (dGH)
✓ Compatible
Celebes Rainbowfish
10–25
Florida Flagfish
10–25
Water Type
✓ Compatible
Celebes Rainbowfish
Brackish Tolerant
Florida Flagfish
Brackish Tolerant
Flow Preference
✓ Compatible
Celebes Rainbowfish
Moderate
Florida Flagfish
Low
Min Tank Volume
Combined: 90 L
Celebes Rainbowfish
75 L
Florida Flagfish
75 L
Swimming Level
Shared: 1 zone
Celebes Rainbowfish
TopMiddle
Florida Flagfish
MiddleBottom
🏷️Behavior Tags
Celebes Rainbowfish
Hyperactive / Fast SwimmerJumper (Lid Required)Fry Predator
Florida Flagfish
Fin NipperAggressive to same species/look-alikesHyperactive / Fast SwimmerTerritorial (Defends specific area)

Behaviour & Temperament

Celebes Rainbowfish is a peaceful species (2/10), while Florida Flagfish is moderately assertive (5/10). This modest difference means Florida Flagfish may occasionally assert dominance over Celebes Rainbowfish.

Celebes Rainbowfish and Florida Flagfish both frequent the Middle (Open Water) region of the setup. This overlap can increase competition for space, so providing ample room and cover is important to keep both species comfortable.

Worth noting: Celebes Rainbowfish is a known jumper, so a tight-fitting lid is essential.

Water Parameters

The safe temperature window for both species falls between 22°C and 26°C. Aim for the midpoint of this range (around 24.0°C) for optimal comfort.

Both fish can tolerate a pH between 7 and 8.5. Maintaining a stable value within this band is more important than hitting an exact number.

For general hardness, the shared comfort zone is 10–25 dGH. Regular testing will ensure conditions stay within this range.

Tank Setup

To house Celebes Rainbowfish and Florida Flagfish together, plan for an aquarium of at least 90 litres with a minimum length of 60 cm. This accounts for the larger species' space requirements with an additional 20 % buffer to reduce territorial tension.

Providing a mix of open swimming space and sheltered areas with rocks, driftwood, or plants will keep both species comfortable and allow natural behaviour.

Specific environmental needs for this combination include: Plants - lighly covered, Established Algae (Otocinclus), Plants - Densely covered. Meeting these requirements will help both species thrive.

Both species do well with moderate (standard) water movement, so a standard filtration setup rated for the tank volume should suffice.

Frequently Asked Questions

Can Celebes Rainbowfish and Florida Flagfish live together?

Yes. Celebes Rainbowfish and Florida Flagfish are considered ideal tank mates. Their water parameters, temperaments, and behaviour profiles are well matched for a community aquarium.

What size tank do Celebes Rainbowfish and Florida Flagfish need?

A minimum of 90 litres (tank length at least 60 cm) is recommended. This provides enough space for both species to establish their own areas and reduces the likelihood of territorial disputes.

What water temperature is best for Celebes Rainbowfish and Florida Flagfish together?

Keep the aquarium between 22°C and 26°C. A target of around 24.0°C sits comfortably within both species' preferred ranges.

Are Celebes Rainbowfish or Florida Flagfish aggressive?

Celebes Rainbowfish is peaceful (2/10) and Florida Flagfish is moderately assertive (5/10). Their similar temperaments generally lead to a peaceful coexistence.

What pH do Celebes Rainbowfish and Florida Flagfish need?

Both species overlap in the 7–8.5 pH range. Consistency is key — avoid sudden swings, and test regularly to stay within this window.

Will Florida Flagfish nip Celebes Rainbowfish's fins?

Florida Flagfish is a known fin nipper. If Celebes Rainbowfish has long or flowing fins, there is a real risk of fin damage. Keeping Florida Flagfish in a larger group can help redirect nipping behaviour toward conspecifics.

How do I manage Florida Flagfish's territorial behaviour?

Provide line-of-sight breaks using rocks, driftwood, and dense planting. A larger tank gives Florida Flagfish space to claim a territory without encroaching on the other fish's area. Adding décor that divides the tank into distinct zones works especially well.


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