Blind Cave Tetra

Astyanax mexicanus

Also known as: Mexican Tetra, Blind Cavefish

An eyeless, pale pink cave fish that finds its way and its food by sensing water movement.

Water

Freshwater

Temperature

68–77°F

pH

6.5–8

Hardness

5–20 dGH

Max size

3.5 in

Min tank

30 gal

Temperament

Semi-aggressive

Social

Schooling (6+)

Swim level

Mid-bottom

Diet

Omnivore

Care level

Beginner

Lifespan

10-15 years

Breeding

Egg-scatterer

Suitability

Common

Origin

Cave systems of San Luis Potosi and Tamaulipas, Mexico

Keep a group of 6 or more in slightly cooler, neutral to hard water. They are robust and can nip slow or long-finned tankmates, so pair them with other sturdy fish. Blindness is not a problem; they find food easily without special care.