🐟 Mexican Blind Cave Tetra (Astyanax mexicanus (cave morph))
An Eyeless, Pigment-Free Body That Glows With a Soft Pink-Silver Sheen • Navigates Entirely Through an Exceptional Sensory Lateral Line • One of the Hardiest, Most Unusual Fish in the Hobby
 
📋 The Mexican Blind Cave Tetra is the remarkable cave-dwelling form of the Mexican Tetra, born with eyes that fully degenerate and are reabsorbed within a few weeks of life. Its body carries no pigmentation at all, a pale pink-to-silver-white that develops a soft iridescent sheen as it matures.
It comes from the cave systems of San Luis Potosí and Tamaulipas in Mexico, having evolved in complete darkness over hundreds of thousands of years. Every Mexican Blind Cave Tetra we ship is feeding well.
Despite having no functional eyesight, this species navigates its surroundings remarkably well through an exceptional lateral-line sensory system, detecting vibration and water movement with real precision, and rarely bumps into tank decor, other fish, or the glass. It's genuinely one of the hardiest fish in the hobby, an avid, eager feeder that thrives in a shoal of 6 or more. It reaches 8-10cm, so a 100L tank suits a school well.
 
💡 Highlights
👁️ Eyeless From a Young Age: Born with eyes that fully degenerate within weeks
⚪ No Pigmentation: A pale pink-silver body with an iridescent sheen
📡 Exceptional Sensory Navigation: Detects vibration and movement with real precision
💪 One of the Hardiest Fish in the Hobby: A tough, adaptable, avid feeder
👥 True Shoaling Fish: Best kept in groups of 6 or more