Can Marble Goby and Peacock Gudgeon Live Together?
Marble Goby and Peacock Gudgeon are not recommended as tank mates due to piscivorous fish will prey on nano-sized tank mates.. Housing these species together is likely to result in stress, health problems, or direct harm to one or both fish.
At a Glance
Can your tank handle Marble Goby and Peacock Gudgeon?
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.
Shared setup supplies
We may earn from qualifying purchases
Behaviour & Temperament
Marble Goby is a semi-aggressive species (7/10), while Peacock Gudgeon is peaceful (2/10). This notable difference means Marble Goby may occasionally assert dominance over Peacock Gudgeon.
Marble Goby and Peacock Gudgeon 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.
There is a critical concern: the Piscivore (Eats small/nano fish) behaviour of one fish directly conflicts with the Nano / Bite-sized (Predation Risk) trait of the other — piscivorous fish will prey on nano-sized tank mates..
Additional behavioural considerations to keep in mind: Shrimp eaters may also prey on very small nano fish.
Worth noting: Marble Goby is nocturnal and will be most active after lights-out, naturally reducing daytime encounters.
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 6.5 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 5–10 dGH. Regular testing will ensure conditions stay within this range.
Water care products
We may earn from qualifying purchases
Tank Setup
To house Marble Goby and Peacock Gudgeon together, plan for an aquarium of at least 600 litres with a minimum length of 180 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: Sand (Sifters), Driftwood (Digestion/Hiding), Smooth Gravel (Sensitive Barbels), Plants - Densely covered. Meeting these requirements will help both species thrive.
Both species do well with low (still water) water movement, so a standard filtration setup rated for the tank volume should suffice.
Suitable Tank Sizes
Standard aquarium sizes large enough for both Marble Goby and Peacock Gudgeon.
Diet & Feeding
Feeding time deserves special attention with this pairing. Marble Goby is a known shrimp eater and may prey on small invertebrates or nano fish like Peacock Gudgeon.
Feeding products to consider
We may earn from qualifying purchases
.webp?2026-04-25T14%3A35%3A38.022Z)
Frequently Asked Questions
Can Marble Goby and Peacock Gudgeon live together?
No. This combination is not recommended. Key incompatibilities — such as critical behavioural conflicts — make cohabitation unsafe.
What size tank do Marble Goby and Peacock Gudgeon need?
A minimum of 600 litres (tank length at least 180 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 Marble Goby and Peacock Gudgeon 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 Marble Goby or Peacock Gudgeon aggressive?
Marble Goby is semi-aggressive (7/10) and Peacock Gudgeon is peaceful (2/10). The gap in aggression levels means the calmer fish may experience stress from the more assertive one.
What pH do Marble Goby and Peacock Gudgeon need?
Both species overlap in the 6.5–7.5 pH range. Consistency is key — avoid sudden swings, and test regularly to stay within this window.
How do I manage Marble Goby's territorial behaviour?
Provide line-of-sight breaks using rocks, driftwood, and dense planting. A larger tank gives Marble Goby 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.
Does Marble Goby being nocturnal affect compatibility?
Marble Goby is most active after lights-out, which naturally reduces daytime encounters with its tank mate. This can actually be beneficial, as both fish get undisturbed time to feed and explore. Just ensure food reaches Marble Goby during evening hours.
Related Comparisons
Marble Goby & Knight Goby
·
Marble Goby & Purple Spotted Gudgeon
·
Marble Goby & Bumblebee Goby (Brackish)
·
Marble Goby & Empire Gudgeon
·
Marble Goby & Florida Flagfish
·
Marble Goby & Gangetic Leaf Fish
·
Peacock Gudgeon & Neon Blue Goby
·
Peacock Gudgeon & Apistogramma borellii (Umbrella Cichlid)
·
Peacock Gudgeon & Apistogramma Mamoré
·
Peacock Gudgeon & Apistogramma Resticulosa Mamor
·
Peacock Gudgeon & Apple Snail
·
Peacock Gudgeon & Bee Shrimp (Crystal Red / Black)
·