Fish is one of the ancient groups of vertebrates living on Earth over 300 million years. They now inhabit most waters of the globe, despite the different conditions of existence in them. For a long period of evolutionary development and adaptation to life under different conditions has resulted in an extraordinary diversity of fish species.
In home aquariums usually contain a warm-water exotic fish. They have bright coloration, small size and habit of living at a stable temperature. Fish that do not tolerate temperatures below 18-20 degrees, are warm, but some time most of them may exist without much harm to themselves at lower temperatures.
Aquarium fish can live in the bottom layers of water, such as various catfish, in medium – size viviparous toothcarps. There are kinds of aquarium fish living in the upper layers of water. Depends on the shape of the aquarium to the content of specific fish species. Continue reading
Wels catfish (Silurus glanis) large fish, reaching 5 m length and 300 kg weight, inhabiting rivers and lakes of Europe from the Rhine to the East. To the North of the som is to the South of Finland, South to Asia Minor, the Caspian and Aral seas and flowing into their rivers. No catfish in the rivers of Siberia. There is no com also in England, in the Iberian Peninsula, in France, Italy and Western Greece. Soma colour variable, usually olive-green, almost black back, white belly, flanks irregularly shaped spots. Small reed form, inhabiting the southern part of the Aral sea, intensive black. Dorsal fin catfish in a tiny, barely noticeable, no fatty fin, but the anal is very long. The upper jaw bears two long whiskers on the bottom is four short. Huge mouth soma gives away the predator. Really, catfish— a voracious predator that eats small fish, frogs, large bivalves. There were cases of attacks soma a water bird swims and the river dogs. Still, the voracity of the catfish greatly exaggerated. Usually catfish are holding in the Continue reading
Many people have a variety of Hobbies. One of the easiest and less time consuming ways to get the aquarium fish that don’t require hours of daily care. Observation of aquarium fish helps strengthen the nervous system.
When you choose aquarium you should consider that a little aquarium is less convenient. It must often be washed and cleaned. The fish in a small aquarium will include less. Small young fish may not reach their normal sizes in a small space.
The best choice would be an aquarium of 60 liters. This aquarium is easier to create the right biological balance. The number of fish is calculated based on their length. 1 cm long fish needs to have 1 liter of water. A greater number of fish you can keep in an aquarium equipped with a compressor. Continue reading