Blind Cave Tetra (Astyanax Mexicanus)
The Blind Cave Tetra is a fascinating freshwater fish species native to the caves of Mexico. They are known for their lack of pigmentation and their unique adaptation to living in complete darkness: they are born without functioning eyes. Despite their lack of vision, these fish are active swimmers and can make an interesting addition to a home aquarium.
Here is what you need to know about this fantastic fish:
Blind Cave Tetras are typically a pale, translucent white or silver color due to their lack of pigmentation. They have a streamlined body shape, with a slightly rounded belly, and grow to around 3 inches in length. Although they have vestigial eyes, they are covered by a layer of skin, rendering them non-functional.
Despite their blindness, Blind Cave Tetras are active swimmers that navigate their environment using a keen sense of touch and smell. They are generally peaceful fish but can be a little nippy towards tank mates with long fins. They are schooling fish, and it is recommended to keep them in groups of at least 6 for their social well-being.
Tank Habitat and Care:
Blind Cave Tetras thrive in a dimly-lit aquarium with a minimum size of 20 gallons. It is essential to provide them with hiding spots such as caves and overhangs. They prefer a sandy substrate with smooth rocks and driftwood. Water parameters should be stable, with a pH of 6.5-8.0, a hardness of 5-20 dGH, and a temperature of 68-77°F.
Blind Cave Tetras are omnivorous, and their diet should include high-quality flake food, small pellets, and frozen or live foods such as brine shrimp, daphnia, and bloodworms.
To learn more about this fish, be sure to check out the Additional Information tab.