Fishician®Diet
Omnivore – sinks to bottom for food; flake, pellets, frozen foods
Aquarium species profile
Blind Cave Tetra
Astyanax mexicanus · North/Central America (Mexico, cave forms)
Minimum tank20 gal
Adult size3"
Care levelEasy
TemperamentSemi-aggressive
Temperature68–82°F
pH range6.5–8.0
Compatible tank mates
Robust community fish, barbs, larger tetras
Tank mates to avoid
Delicate long-finned fish (may nip), very small fish
Care notes
Cave-adapted form with no eyes and reduced pigment. Navigates entirely by lateral line. Fascinating behavior — bumps into nothing. Hardy omnivore; thrives in many conditions including hard, alkaline water.
Check the whole aquarium. Tank size alone does not establish compatibility. Confirm adult size, water overlap, social grouping, territory, diet, and the individual animals before stocking.