In natural conditions, the spotted-tailed girardinus lives in small reservoirs with fresh and brackish water in Uruguay, Paraguay, Argentina and southern Brazil.
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Fish are gray-brown to yellowish in color. The upper part of the body is brownish-green, the sides are bright yellow, and the abdomen is gray-yellow. The tail and the lower part of the dorsal fin have shiny spots with a silvery edging. Males have a dark edging on the dorsal fin. In addition, males are smaller than females, their size does not exceed 3 cm, while the female reaches 6 cm in length. Females develop much faster than males.
Girardinus spotted-tailed fish is peaceful, with a calm character. You can keep fish both in the species and in the general aquarium with other peace-loving fish. The aquarium should have a volume of 20 liters or more and be densely planted with a variety of plants, including floating ones. Gyrardinuses have an interesting feature of changing their color depending on the surrounding conditions. This is especially true when the level of illumination and water temperature in the aquarium changes. Fish spend most of their time in the middle and upper layers of the aquarium water.
Water parameters must meet the following conditions: temperature 10-25 ° С, hardness dH 10-25 °, acidity pH 7.0-8.0. Fish normally tolerate significant fluctuations in water temperature and are able to live in aquariums without heating, the main thing is that the temperature in them does not fall below 12 ° C. The water should be old, but clear, slightly salty, for which it is enough to add table salt in a proportion of 2 grams per liter of water. Filtration, aeration is required (although, in principle, it is not necessary) and weekly replacement of 1/5 of the aquarium water with fresh water.
Lighting should be bright, with an intensity of 0.5 W / l. It is advisable to allow direct sunlight to enter the aquarium, which generally has a beneficial effect on the overall well-being of the fish.
Fish are omnivores, they eat a variety of live food with pleasure. Vegetable feeding is necessary (algae, crushed lettuce leaves, etc.), without which fish reproduce poorly. It is required to monitor the dimensions of the dispensed feed, because fish have a rather narrow throat due to which they often gag when swallowing relatively large food.
The spotted-tailed girardinus reaches its sexual maturity at the age of 3-4 months.
The fry are tiny, in the first days of their life they are fed with live dust and other micro-feeds. As the fry grow, their diet is expanded, giving Artemia, Cyclops, and hard-boiled egg yolk.
The life span of spotted-tailed girardinus in aquarium conditions is about 3 years.
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Adults reach a length of 4–5 cm. Somik has a typical appearance for corridors and differs from congeners only in body pattern. The color is gray with pink shades with numerous dark specks all over the body. As noted above, a characteristic feature of the species is a rounded black spot on the caudal peduncle. It is worth noting that young fish do not look like adults. There is no spot in the body pattern, and the main color consists of black-gray pigmentation.
Maintenance and care
A relatively small aquarium of 70–80 liters with sandy substrates and several shelters at the bottom in the form of driftwood or thickets of plants is considered a comfortable environment for keeping the Spotted-tailed Corridor. The water is warm, soft, slightly acidic. Avoid the accumulation of organic waste and sudden changes in pH and dGH values. To maintain the biological balance in the aquarium, it is necessary to equip it with all the necessary equipment (heaters, filtration system, lighting) and carry out regular maintenance. The latter includes such procedures as equipment maintenance, weekly replacement of some of the water with fresh water, cleaning the soil and design elements, etc.
Food. Omnivorous, accepts most dry, freeze-dried, frozen and live foods of suitable size. The main condition is that the products must be sinking, since catfish are bottom dwellers.
Behavior and Compatibility. Calm friendly little fish. Prefers to be in the company of relatives. The same peaceful species of comparable size will become good neighbors. Corridors are able to get along with almost everyone who does not try to eat them.