Signs. Body elongated, laterally compressed, glabrous. The coloration of back, sides of body and all fins, except the ventral, zelenovato-grey, almost black. Dorsal fin very short, is located ahead of the pelvic fins. Spiny rays of the pectoral fin serrated on the outer edge. Lower jaw longer than upper. Mouth facing up.
Distribution. Big 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.
Feature. 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. Continue reading
Waters of the Andaman sea that washes the Western part of Thailand, is rich in diverse marine life and sharks. Does this mean that bathing is dangerous?
Yes, indeed, in the Andaman sea sharks swim. Moreover, almost all of which is considered a dangerous species great white, reef, and tiger, and black. They often say, how about sharks-cannibals. In the coastal zone are found the Mako shark and blue sharks and hammerhead sharks. There are a few quite harmless to human kinds – nurse sharks and Zebra shark.
However, despite all this, your chances of becoming a victim of the sharks here are very small. Thailand is a fairly safe area, because there is no particular concern about marine predators the rest of the family with children. Shark attack in Thailand — the big rarity. First, sharks don’t swim close to the shore. Secondly, over the last few decades, there were no reported cases of shark attacks on humans in these waters. So to meet a shark in the Andaman sea area is possible only in a saltwater aquarium or specially going to scuba dive in the open sea. Continue reading
Fish enliven the garden pond and justify their presence in it that eat mosquito larvae and other insects. However, the presence of fish in the pond is desirable, but not necessarily, because usually has little effect on the maintenance of the purity of water.
When choosing fish, primarily guided by the size of your pond. If you are not strapped for cash, you probably will want to buy expensive beautiful carps. Unfortunately, these fish are harmful to the plants-oxygenators. Like other species of carp, they need a reservoir with a surface area of not less than 7.5 sq. m. At the other end of the scale are hardy and plain ordinary goldfish and shubunkin that can live in any, even very tiny pond — it is necessary only to ensure that in winter the surface water is not delayed by ice for a long time. Between koi and goldfish is Golden Orff, which required a pond with a surface area of at least 3.5 sq m. Another important consideration is whether will be visible to fish. The most suitable from this point of view fish are ordinary goldfish and more mobile gold Orff, since they always stay at the water surface. Continue reading