Can Ajamaru Rainbowfish and Antennae Stingray Live Together?

Not Recommended

Ajamaru Rainbowfish and Antennae Stingray are not recommended as tank mates due to conflicting pH requirements. Housing these species together is likely to result in stress, health problems, or direct harm to one or both fish.


At a Glance

Ajamaru Rainbowfish

Melanotaenia ajamaruensis

Antennae Stingray

Plesiotrygon iwamae

🐠Family Group
Ajamaru Rainbowfish
Rainbowfish
Antennae Stingray
Oddballs
Temperament
Ajamaru Rainbowfish
Peaceful (2/10)
Antennae Stingray
Semi-Aggressive (5/10)
Temperature
✓ Compatible
Ajamaru Rainbowfish
24–28°C
Antennae Stingray
24–28°C
pH Range
✗ No overlap
Ajamaru Rainbowfish
7.2–8.5
Antennae Stingray
6–7
Hardness (dGH)
✓ Compatible
Ajamaru Rainbowfish
8–20
Antennae Stingray
1–10
Water Type
✓ Compatible
Ajamaru Rainbowfish
Freshwater Only
Antennae Stingray
Freshwater Only
Flow Preference
✓ Compatible
Ajamaru Rainbowfish
Moderate
Antennae Stingray
Moderate
Min Tank Volume
Combined: 2500 L
Ajamaru Rainbowfish
150 L
Antennae Stingray
2500 L
Swimming Level
✓ Different zones
Ajamaru Rainbowfish
TopMiddle
Antennae Stingray
Bottom
🏷️Behavior Tags
Ajamaru Rainbowfish
Hyperactive / Fast SwimmerJumper (Lid Required)Fry Predator
Antennae Stingray
Piscivore (Eats small/nano fish)Shrimp EaterFry PredatorDigger (Disturbs Substrate)
Stocking calculator

Can your tank handle Ajamaru Rainbowfish and Antennae Stingray?

Compatibility is only part of the answer. Test both fish with your real tank size, current stock, and maintenance needs to see if you have enough space and a safe stocking level before you add them.

Ajamaru Rainbowfish
Antennae Stingray
Test both in my tank

Behaviour & Temperament

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

In terms of spatial distribution, Ajamaru Rainbowfish prefers the Top (Surface) and Middle (Open Water) zones, whereas Antennae Stingray occupies the Bottom (Substrate) zone. Because they use different levels of the water column, territorial disputes are less likely and the tank will appear more balanced.

Worth noting: Ajamaru Rainbowfish 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.

The pH requirements of Ajamaru Rainbowfish (7.2–8.5) and Antennae Stingray (6–7) do not overlap, making it impossible to satisfy both species simultaneously.

For general hardness, the shared comfort zone is 8–10 dGH. Regular testing will ensure conditions stay within this range.

Tank Setup

To house Ajamaru Rainbowfish and Antennae Stingray together, plan for an aquarium of at least 2500 litres with a minimum length of 240 cm. This recommendation combines the stricter species minimums with a community-load allowance so the pairing has realistic long-term space and filtration headroom.

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, Sand (Sifters), 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 Ajamaru Rainbowfish and Antennae Stingray live together?

No. This combination is not recommended. Key incompatibilities — such as critical behavioural conflicts — make cohabitation unsafe.

What size tank do Ajamaru Rainbowfish and Antennae Stingray need?

A minimum of 2500 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 Ajamaru Rainbowfish and Antennae 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 Ajamaru Rainbowfish or Antennae Stingray aggressive?

Ajamaru Rainbowfish is peaceful (2/10) and Antennae Stingray is moderately assertive (5/10). Their similar temperaments generally lead to a peaceful coexistence.

What pH do Ajamaru Rainbowfish and Antennae Stingray need?

Their pH requirements do not overlap. Ajamaru Rainbowfish prefers 7.2–8.5, while Antennae Stingray needs 6–7. This makes them incompatible in the same water chemistry.


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