Can Empire Gudgeon and Scat (Brackish) Live Together?

🟢Ideal Tank Mates

Yes, Empire Gudgeon and Scat (Brackish) 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 540 litres is recommended.


At a Glance

Empire Gudgeon

Hypseleotris compressa

Scat (Brackish)

Scatophagus argus

🐠Family Group
Empire Gudgeon
Gobies & Gudgeons
Scat (Brackish)
Oddballs
Temperament
Empire Gudgeon
Mostly Peaceful (3/10)
Scat (Brackish)
Mostly Peaceful (4/10)
Temperature
✓ Compatible
Empire Gudgeon
20–28°C
Scat (Brackish)
20–28°C
pH Range
✓ Compatible
Empire Gudgeon
6.5–8.5
Scat (Brackish)
7.5–8.5
Hardness (dGH)
✓ Compatible
Empire Gudgeon
5–20
Scat (Brackish)
12–30
Water Type
✓ Compatible
Empire Gudgeon
Brackish Tolerant
Scat (Brackish)
Brackish Required
Flow Preference
✓ Compatible
Empire Gudgeon
Moderate
Scat (Brackish)
High
Min Tank Volume
Combined: 540 L
Empire Gudgeon
110 L
Scat (Brackish)
450 L
Swimming Level
Shared: 2 zones
Empire Gudgeon
MiddleBottom
Scat (Brackish)
MiddleBottom
🏷️Behavior Tags
Empire Gudgeon
Shrimp EaterFry PredatorHyperactive / Fast SwimmerJumper (Lid Required)
Scat (Brackish)
Plant DestroyerHyperactive / Fast SwimmerAggressive Eater (Starves shy fish)Fin Nipper

Behaviour & Temperament

Empire Gudgeon is a generally mild-mannered species (3/10), while Scat (Brackish) is generally mild-mannered (4/10). This modest difference means Scat (Brackish) may occasionally assert dominance over Empire Gudgeon.

Empire Gudgeon and Scat (Brackish) both frequent the Middle (Open Water) and Bottom (Substrate) 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: Empire Gudgeon is a known jumper, so a tight-fitting lid is essential.

Water Parameters

The safe temperature window for both species falls between 20°C and 28°C. Aim for the midpoint of this range (around 24.0°C) for optimal comfort.

Both fish can tolerate a pH between 7.5 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 12–20 dGH. Regular testing will ensure conditions stay within this range. An aquarium test kit is recommended for monitoring.

Tank Setup

To house Empire Gudgeon and Scat (Brackish) together, plan for an aquarium of at least 540 litres with a minimum length of 150 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 - Densely covered, Driftwood (Digestion/Hiding), Sand (Sifters), Smooth Gravel (Sensitive Barbels), Established Algae (Otocinclus). Meeting these requirements will help both species thrive.

Note a potential conflict in setup requirements: Scat (Brackish) is a plant destroyer, which conflicts with Empire Gudgeon's requirement for live plants. Compromise where possible or prioritise the more critical need.

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

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Frequently Asked Questions

Can Empire Gudgeon and Scat (Brackish) live together?

Yes. Empire Gudgeon and Scat (Brackish) are considered ideal tank mates. Their water parameters, temperaments, and behaviour profiles are well matched for a community aquarium.

What size tank do Empire Gudgeon and Scat (Brackish) need?

A minimum of 540 litres (tank length at least 150 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 Empire Gudgeon and Scat (Brackish) together?

Keep the aquarium between 20°C and 28°C. A target of around 24.0°C sits comfortably within both species' preferred ranges.

Are Empire Gudgeon or Scat (Brackish) aggressive?

Empire Gudgeon is generally mild-mannered (3/10) and Scat (Brackish) is generally mild-mannered (4/10). Their similar temperaments generally lead to a peaceful coexistence.

What pH do Empire Gudgeon and Scat (Brackish) need?

Both species overlap in the 7.5–8.5 pH range. Consistency is key — avoid sudden swings, and test regularly to stay within this window.

Will Scat (Brackish) nip Empire Gudgeon's fins?

Scat (Brackish) is a known fin nipper. If Empire Gudgeon has long or flowing fins, there is a real risk of fin damage. Keeping Scat (Brackish) in a larger group can help redirect nipping behaviour toward conspecifics.


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