Can Celebes Rainbowfish and Mbu Puffer Live Together?

🟡Possible with Caution

Keeping Celebes Rainbowfish and Mbu Puffer together is possible but requires caution due to differing aggression levels. Provide a spacious tank of at least 1800 litres with plenty of hiding spots to reduce stress. Monitor behaviour closely, especially during the first few weeks.


At a Glance

Celebes Rainbowfish

Marosatherina ladigesi

Mbu Puffer

Tetraodon mbu

🐠Family Group
Celebes Rainbowfish
Rainbowfish
Mbu Puffer
Puffers
Temperament
Celebes Rainbowfish
Peaceful (2/10)
Mbu Puffer
Aggressive (7/10)
Temperature
✓ Compatible
Celebes Rainbowfish
22–28°C
Mbu Puffer
24–28°C
pH Range
✓ Compatible
Celebes Rainbowfish
7–8.5
Mbu Puffer
7–8
Hardness (dGH)
✓ Compatible
Celebes Rainbowfish
10–25
Mbu Puffer
10–25
Water Type
✓ Compatible
Celebes Rainbowfish
Brackish Tolerant
Mbu Puffer
Freshwater Only
Flow Preference
✓ Compatible
Celebes Rainbowfish
Moderate
Mbu Puffer
Moderate
Min Tank Volume
Combined: 1800 L
Celebes Rainbowfish
75 L
Mbu Puffer
1500 L
Swimming Level
Shared: 1 zone
Celebes Rainbowfish
TopMiddle
Mbu Puffer
MiddleBottom
🏷️Behavior Tags
Celebes Rainbowfish
Hyperactive / Fast SwimmerJumper (Lid Required)Fry Predator
Mbu Puffer
Snail EaterPiscivore (Eats small/nano fish)Generally AggressiveFin NipperDigger (Disturbs Substrate)Aggressive Eater (Starves shy fish)

Behaviour & Temperament

Celebes Rainbowfish is a peaceful species (2/10), while Mbu Puffer is semi-aggressive (7/10). This notable difference means Mbu Puffer may occasionally assert dominance over Celebes Rainbowfish.

Celebes Rainbowfish and Mbu Puffer 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.

To improve the chances of a peaceful coexistence in this community tank: A larger aquarium with ample hiding spots can help diffuse aggression and give the less dominant fish space to retreat. Keep fin nippers in larger groups to distribute nipping behaviour among conspecifics rather than tank mates.

Water Parameters

The safe temperature window for both species falls between 24°C and 28°C. Aim for the midpoint of this range (around 26.0°C) for optimal comfort.

Both fish can tolerate a pH between 7 and 8. 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 Mbu Puffer together, plan for an aquarium of at least 1800 litres with a minimum length of 240 cm. This accounts for the larger species' space requirements with an additional 20 % buffer to reduce territorial tension.

Because this pairing requires extra vigilance, include plenty of hiding spots — caves, driftwood, and dense plant clusters — so the less dominant fish can retreat when needed.

Specific environmental needs for this combination include: Plants - lighly covered, Sand (Sifters), Shells (Breeding/Hiding), Smooth Gravel (Sensitive Barbels). 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 Mbu Puffer live together?

They can coexist, but the pairing requires careful monitoring. Provide ample space (at least 1800 litres), plenty of hiding spots, and watch for signs of stress or aggression.

What size tank do Celebes Rainbowfish and Mbu Puffer need?

A minimum of 1800 litres (tank length at least 240 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 Mbu Puffer together?

Keep the aquarium between 24°C and 28°C. A target of around 26.0°C sits comfortably within both species' preferred ranges.

Are Celebes Rainbowfish or Mbu Puffer aggressive?

Celebes Rainbowfish is peaceful (2/10) and Mbu Puffer is semi-aggressive (7/10). The gap in aggression levels means the calmer fish may experience stress from the more assertive one.

What pH do Celebes Rainbowfish and Mbu Puffer need?

Both species overlap in the 7–8 pH range. Consistency is key — avoid sudden swings, and test regularly to stay within this window.

Will Mbu Puffer nip Celebes Rainbowfish's fins?

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


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