Bucktooth Tetra
Exodon paradoxus
Bucktooth Tetra (Exodon paradoxus) — Easy care, Peaceful, under Tetra & Characin. Minimum tank in the app: 45 US gal min; aim for 73–82°F and pH 5.5–7.5. The Bucktooth Tetra is an engaging choice for aquarists looking to maintain dynamic shoals of active swimmers.

Captive lifespan reflects typical experience in a home aquarium, not maximum recorded age; genetics, sourcing, and care vary.
Natural distribution
Mostly South America
- South America
Regional colours match the stocking calculator’s origin map.
Bucktooth Tetra Tank Setup
Create a spacious tank with a minimum of 170 liters, incorporating both open swimming areas and plenty of cover such as plants and driftwood. Opt for a substrate that allows for easy movement and consider moderate lighting to mimic their natural habitat. A gentle water flow will help them feel comfortable and encourage their mid-water swimming behavior.
What Do Bucktooth Tetras Eat?
These fish are omnivorous and prefer micro-sized foods, leading to competitive feeding scenarios if not managed properly. They tend to feed quickly, so it’s best to provide multiple feeding spots to minimize competition.
Bucktooth Tetra Tank Mates
Bucktooth Tetras harmonize well with similarly sized, peaceful species that occupy the mid to upper levels of the tank. Ideal companions include other tetras, rasboras, and smaller cichlids. However, avoid aggressive species or those that might outcompete them for food, as this can lead to stress and behavioral changes.
Are Bucktooth Tetras Good for Beginners?
In App-aquatic we file this under easy care. That still means a cycled tank, realistic stocking, and parameters that do not swing every weekend. Aquarists often underestimate the space requirements for shoaling species, leading to overcrowding that stresses the fish. introducing them into a tank with aggressive tank mates or inadequate cover can trigger territorial disputes and diminish their well-being.
Building a community? Run the full list through the stocking calculator before you add anything else.
Log tests and reminders in App-aquatic—free, same data you see here.




