Blind Cave Tetra     Astanax mexicanus

An interesting fish also known as the Mexican Tetra.  The "blind cave" version of this fish is a cave dwelling species that has evolved to have no eyes.  The eyes have skin grown over them to protect them from being damaged in the dark confines of caves.  The fish use their lateral line to sense what is around them and find their way around in caves. 

Grows to: 4.5"

Hobbyist Level:  Not recommended for beginners.

How Many?  They are a schooling fish that should be be purchased in groups of 4 or more.  Six or more is best.

Housing:  Provide plenty of swimming room as well as some bushy plants for hiding.  They look good with a dark substrate.  They swim in the middle region of the tank.  They enjoy a healthy water current.  Minimum tank size is about 30 gallons. (Temperature- 72-82),  (pH 6.5-7.5)

Tank mates:  They are an active fish best mixed with other active fish such as barbs.  They can be fin nippers so avoid tank mates with long fins. 

Feeding:  They will accept a variety of foods.  Feed flakes, along with brine shrimp and frozen foods.  Tetras will show their best color after you have owned it for a few months and have given them a good diet.  They are an omnivore.

Natural Habitat:  Lower Rio Grande River, including Texas and Mexico.   Fish sold at Elmer's are domestically raised.

Males and Females:  Females may appear more round bodied when plump with eggs.

See also:  Tetras