Som is a major accesata fish that live in fresh water. Belongs to the family of catfish. This species is widely distributed in Europe. The habitat covers the majority of European countries except Spain, the UK, Italy, Norway. In the North the fish can be found in the southern water area in Sweden and Finland. In the South area of distribution reaches the coastal waters of the Black and Aegean seas. In Russia fish is spread up to the Urals. It is also found in Asia. The Aral sea basin. Members of the species and swim in the salty waters of the Black, Caspian and Baltic seas. The highest concentration observed at the mouths of large rivers and reservoirs. In the upper reaches of rivers is rare.


Body soma long. In front of it is rounded, and the rear part is compressed laterally. The head is broad and flat, eyes small and shifted to the frontal area. In the mouth has many small teeth. In the upper jaw are long whiskers one on each side. In the lower jaw there are 2 short whisker on each side. A long anal fin which reaches almost to the caudal fin. The dorsal fin is small, sharp and shifted towards the head. The pectoral fins are broad. Their fish creates a vortex in the water to disorient the victim. The skin is slippery and smooth. Scales out of it.

Body colour not monochrome. Back cantenna, almost black. The flanks are greenish-brown and diluted by lighter spots. The belly is light gray. It is more correct to call it off-white. In waters with flowing water the fish is lighter colored, and in stagnant waters it is much darker. Continue reading

The content of aquarium fish

In Zoological shop sells aquariums, varying in shape and size: rectangular, cylindrical, spherical. For keeping and breeding fish is considered to be a convenient rectangular all-glass aquarium. Many people make themselves decorative aquariums-pictures, aquariums-screens, etc.

To do this, take corner of sheet iron, glass, putty. Metal corner make a rectangular frame, insert the bottom and sides of glass. Then cover the cracks with special putty. Check the aquarium for leaks. Putty you can prepare yourself.

To do this, take two parts of dry sifted chalk, one part of red lead, mixed with hemp linseed oil to the consistency of thick putty, or 1 kg of drying oil oksol, heated to 60°C, adding 0.2 kg of bee wax, 2 kg red lead or gustotertoj paints. All components mix thoroughly and gradually add the chalk or tooth powder until the desired consistency. Set the aquarium on a well-lit area. If there is no such place, for artificial lighting, use fluorescent lamps or incandescent lamps. Lighting the aquarium should be from 8 to 21h. It is not recommended to set the aquarium on the windowsill, where frequently changing light conditions and temperature.

For aquarium maintenance preoperational:

— feeder fish;

— nets of various dimensions;

— a hose with a nozzle to remove the precipitate;

compressor; Continue reading

Dangerous inhabitants of the Black sea

Annually blessed “Tavrida shores” for hundreds of thousands of tourists who are absorbed in only one purpose: to quickly plunge in the gentle waves of the Black sea or to throw the bait into its depths. But, unfortunately, not all coming to rest know that careless bather can lie in wait for troubles associated not only with threat of storm waves, submerged rocks and currents, great depths, but also with some representatives of marine fauna, which may cause harm to the health.

What you need to know about the dangerous inhabitants of the black sea depths?

One of the potentially dangerous creatures can bite on your hook just a few metres from the shore. If you get out of the water wicked-looking brownish fish with a length of 10-20 cm, whose head with big bleary eyes covered with spikes and spines, and spotted the back is crowned with the same barbed fin, know that it is a marine fish or the Scorpion ( Scorpaena porcus ) . He lives usually on rocky ground, clogging under large rocks and in crevices of rocks, where waiting for prey – smaller fish. Pick up ruff unsafe, because the dorsal and Gill spines its poisonous, prick them brings about a short-term, but rather pain, dizziness, and weakness. Therefore, to remove ruff with Kruchinina very carefully, and when you cook it from your ear (and it turns out excellent!), you must remove all the thorns.

Sometimes desert shallow water with a sandy bottom can be found big (half a meter) fish, which has a flattened, diamond shaped body, ending with a long, thin tail. This Stingray or the marine cat ( Dasyatis pastinaca) . At the end of his tail is white bone spike with a lot of small poisonous chipping. If you accidentally step in the water the peacefully lying on the sand of the ramp, then he can hit the hapless swimmer in the leg with his spike and cause ragged, painful, and long healing wounds. Continue reading

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