Catfish, pygmy Corydoras pygmaeus
Catfish-the pygmies (pygmaeus Corydoras, Catfish black) – tiny members of the family kellytoy kgs.
The natural habitat of the tributaries of the Amazon river. Hold usually silted, slow-flowing and stagnant waters.
The appearance and behavior. The name catfish was due to its small size (not more than 3 cm in females, 2.5 cm – males). The body elongated, sides covered with bony plates. Color – greenish-gray, breast and belly are whitish and shiny. Along the body is a black band running to the caudal fin base and terminating in a spot. The fins are transparent. On the upper and lower jaws there are 2 pairs of antennae. Females are larger and broader than males.
Catfish-the pygmies – fish schooling. Live in benthonic layer of water. Curious and agile, but can be virtually invisible in the aquarium. Their favorite activity is to dig in the soil or hide during the days and rest on the leaves and the grass. Occasionally there may appear a flock in the water column. Periodically do rapid shots to the surface of the water with oxygen and returned to the place. (In this feature the genus Corydoras – the presence of both Gill and intestinal breathing.)
Requirements to the aquarium and the water. The aquarium is suitable from 15 l. to the flocks of 6-8 individuals.Water parameters: temperature 22 to 26°C, pH 6,5-7,5, a constant stiffness up to 20°. Lighting – not bright, diffused. The aquarium should be fitted with filter and compressor, because the catfish rummaging in the soil, rise from the bottom of the dirt. Also need weekly substitution to 30% of water.
The soil is better to use loose and loose. Secluded places are organized with the help of plants, driftwood, stones, shards. Plants to choose wide, horizontal leaves (such as echinodorus. crypts) – they are comfortable for resting; in addition, small-leaved flora rapidly contaminates recovered from the bottom sludge. The plants are not planted too thickly: it should be a place for swimming and easy access to the water surface for grasping of air.
You can keep them with all small peaceful fish (such as neons. donaciinae), and shrimp.
Feed. Fish are quite picky, eat both dry and various live and frozen food; the only condition is that the amount of food should be small. Well to feed them Cyclops, or brine shrimp, Tubifex and bloodworms are better finely chopped.
Breeding. Pygmies reach sexual maturity within 6-8 months, and males Mature earlier than females. They successfully spawn both in General and in the spawning tank. Spawning put group of fishes so that 1 female had 2-3 males. Better pre-week to hold them separately. To stimulate spawning will help frequent water changes, increased aeration, a brief decrease in temperature at 1-2°C. After mating season and courtship the female lays 30 to 40 eggs, were putting up them around the aquarium – on the leaves of plants, glass, filter. Caviar manufacturers, as a rule, do not eat.
The water temperature increased to 26°C. Larvae hatch after 3-4 days, even after 3 days they begin to feed infusoria, rotifers, Cyclops nauplii. If it is impossible to feed live food you can use dry food for fry. As they grow feeding on Artemia nauplii and nematodes.
A flock of 22-30 catfish pygmy very diversify and adorn their activities any aquarium.