Can Black Pacu and Motoro Stingray Live Together?

🟢Ideal Tank Mates

Yes, Black Pacu and Motoro Stingray 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 4560 litres is recommended.


At a Glance

Black Pacu

Colossoma macropomum

Motoro Stingray

Potamotrygon motoro

🐠Family Group
Black Pacu
Characins
Motoro Stingray
Oddballs
Temperament
Black Pacu
Mostly Peaceful (4/10)
Motoro Stingray
Semi-Aggressive (5/10)
Temperature
✓ Compatible
Black Pacu
22–28°C
Motoro Stingray
24–28°C
pH Range
✓ Compatible
Black Pacu
6–7.5
Motoro Stingray
6–7.5
Hardness (dGH)
✓ Compatible
Black Pacu
2–15
Motoro Stingray
2–10
Water Type
✓ Compatible
Black Pacu
Freshwater Only
Motoro Stingray
Freshwater Only
Flow Preference
✓ Compatible
Black Pacu
Moderate
Motoro Stingray
High
Min Tank Volume
Combined: 4560 L
Black Pacu
3800 L
Motoro Stingray
750 L
Swimming Level
Shared: 1 zone
Black Pacu
MiddleBottom
Motoro Stingray
Bottom
🏷️Behavior Tags
Black Pacu
Plant DestroyerHyperactive / Fast SwimmerJumper (Lid Required)Aggressive Eater (Starves shy fish)Fry Predator
Motoro Stingray
Piscivore (Eats small/nano fish)Shrimp EaterSnail EaterFry PredatorDigger (Disturbs Substrate)

Behaviour & Temperament

Black Pacu is a generally mild-mannered species (4/10), while Motoro Stingray is moderately assertive (5/10). This modest difference means Motoro Stingray may occasionally assert dominance over Black Pacu.

Black Pacu and Motoro Stingray both frequent the 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: Black Pacu is a known jumper, so a tight-fitting lid is essential.

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 6 and 7.5. Maintaining a stable value within this band is more important than hitting an exact number.

For general hardness, the shared comfort zone is 2–10 dGH. Regular testing will ensure conditions stay within this range.

Tank Setup

To house Black Pacu and Motoro Stingray together, plan for an aquarium of at least 4560 litres with a minimum length of 300 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: Smooth Gravel (Sensitive Barbels), Driftwood (Digestion/Hiding), Sand (Sifters). 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 Black Pacu and Motoro Stingray live together?

Yes. Black Pacu and Motoro Stingray are considered ideal tank mates. Their water parameters, temperaments, and behaviour profiles are well matched for a community aquarium.

What size tank do Black Pacu and Motoro Stingray need?

A minimum of 4560 litres (tank length at least 300 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 Black Pacu and Motoro Stingray 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 Black Pacu or Motoro Stingray aggressive?

Black Pacu is generally mild-mannered (4/10) and Motoro Stingray is moderately assertive (5/10). Their similar temperaments generally lead to a peaceful coexistence.

What pH do Black Pacu and Motoro Stingray need?

Both species overlap in the 6–7.5 pH range. Consistency is key — avoid sudden swings, and test regularly to stay within this window.


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