Size
It can grow to a maximum length of 12 cm overall.
Physical Characteristics and Behavior
The Mexican tetra has a drab tint and a characin shape. On the other hand, its blind cave form is unusual for lacking eyes and coloring; its body appears pinkish-white (resembling a person with albinism). Aquarists frequently keep this fish, especially the blind kind. The peaceful species Astyanax mexicanus spends the majority of its time above the stony and sandy bottoms of the pools and backwaters of creeks and rivers that make up its native habitat.
Keeping as Pet
- Water Conditions
Being from a subtropical climate, it prefers water with a pH range of 6.5-8, a hardness of up to 30 dGH, and a temperature range of 20 to 25 °C (68 to 77 °F). Over the course of the winter, some populations migrate to warmer waters. Although it is omnivorous in captivity, it consumes annelids, insects, and crustaceans in its native environment.
- Tank Setup
The Mexican Tetra will adapt more easily to a new tank if it has a dark substrate made of sand or gravel and a cave or shelter. The Mexican Tetra won’t harm any aquarium plants that thrive in such water conditions. When they initially enter a new tank, these fish can be a little timid. They will swim around without any issues once they have figured out the area. They frequently are observed loitering in the tank’s center.
- Tank Companions
These fish can be kept with other fish of similar size and disposition. Mexican tetras make good aquarium mates for one another. The ideal group size is three or more. Additionally, they get along with other tropical fish as long as they are peaceful and respect their personal space. Anything that enjoys cold water and extremely aggressive fish are incompatible tank mates for the Mexican Tetra.
- Food
The Mexican Tetra is a flexible species of fish. Although their food in the wild varies depending on where they are, they like to be primarily carnivorous. Crustaceans, insects, annelids, and other smaller fish make up their diet. These fish will turn omnivorous when kept in captivity or if they are left with no other choice in the wild. They’ll consume packaged flake food. They will also eat wafers made from algae, insect larvae, or supplements of live or frozen meals.
The Blind Cave Tetra will likely take longer than the other fish to reach the food. To make sure they have plenty to eat, add some things that sink.
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