Can Bucktooth Tetra (Exodon) and Neon Blue Goby Live Together?
Bucktooth Tetra (Exodon) and Neon Blue Goby 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
Behaviour & Temperament
Bucktooth Tetra (Exodon) is a highly aggressive species (9/10), while Neon Blue Goby is generally mild-mannered (3/10). This notable difference means Bucktooth Tetra (Exodon) may occasionally assert dominance over Neon Blue Goby.
Large aggression gap (6 points) between Bucktooth Tetra (Exodon) and Neon Blue Goby increases stress risk for the more peaceful fish.
In terms of spatial distribution, Bucktooth Tetra (Exodon) prefers the Middle (Open Water) and Top (Surface) zones, whereas Neon Blue Goby 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.
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..
Worth noting: Bucktooth Tetra (Exodon) is a known jumper, so a tight-fitting lid is essential.
Water Parameters
The safe temperature window for both species falls between 23°C and 28°C. Aim for the midpoint of this range (around 25.5°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 4–12 dGH. Regular testing will ensure conditions stay within this range. An aquarium test kit is recommended for monitoring.
Tank Setup
To house Bucktooth Tetra (Exodon) and Neon Blue Goby together, plan for an aquarium of at least 240 litres with a minimum length of 120 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: Driftwood (Digestion/Hiding), Established Algae (Otocinclus), Smooth Gravel (Sensitive Barbels), 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.
Find the right tank equipment
Browse tanks, décor, and equipment suited for this setup.
Suitable Tank Sizes
Standard aquarium sizes large enough for both Bucktooth Tetra (Exodon) and Neon Blue Goby.
55 Gallon Standard
60 Gallon Breeder
75 Gallon Standard
90 Gallon Standard
125 Gallon Standard
150 Gallon High
Frequently Asked Questions
Can Bucktooth Tetra (Exodon) and Neon Blue Goby live together?
No. This combination is not recommended. Key incompatibilities — such as critical behavioural conflicts — make cohabitation unsafe.
What size tank do Bucktooth Tetra (Exodon) and Neon Blue Goby need?
A minimum of 240 litres (tank length at least 120 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 Bucktooth Tetra (Exodon) and Neon Blue Goby together?
Keep the aquarium between 23°C and 28°C. A target of around 25.5°C sits comfortably within both species' preferred ranges.
Are Bucktooth Tetra (Exodon) or Neon Blue Goby aggressive?
Bucktooth Tetra (Exodon) is highly aggressive (9/10) and Neon Blue Goby is generally mild-mannered (3/10). The gap in aggression levels means the calmer fish may experience stress from the more assertive one.
What pH do Bucktooth Tetra (Exodon) and Neon Blue Goby 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.
Will Bucktooth Tetra (Exodon) nip Neon Blue Goby's fins?
Bucktooth Tetra (Exodon) is a known fin nipper. If Neon Blue Goby has long or flowing fins, there is a real risk of fin damage. Keeping Bucktooth Tetra (Exodon) in a larger group can help redirect nipping behaviour toward conspecifics.
How do I manage Neon Blue Goby's territorial behaviour?
Provide line-of-sight breaks using rocks, driftwood, and dense planting. A larger tank gives Neon Blue 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.
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