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Red eye tetra (Moenkhausia sanctaefilomenae)
AI illustration, not an ID reference

Red eye tetra

Moenkhausia sanctaefilomenae

FishFreshwater

Care level
Easy
Temperament
Semi-aggressive
Recommended tank
100 L
Maximum size
7 cm
Temperature
22–27 °C
pH
6–8
Group size
≥ 6
Diet
Omnivore

Care at a glance

The red eye tetra from southern South America is silvery with a black band at the tail base and a striking red upper rim to the eye. For a tetra it grows fairly large and solidly built.

It is easy and undemanding, but its pace and its tendency to nip fins can unsettle small or long-finned fish. Keep it in a school in a long tank, with tankmates of comparable size and temperament.

Good to know

  • Nips long fins

Related species

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Values are mainstream hobbyist guidance, not gospel — always watch what your own animals need.