Viviparous. These kinds of bright and unpretentious. They hold the palm of popularity among aquarists for several decades. The main secret of its popularity are viviparous their size, colour, simplicity and ease in keeping and breeding. Formed birth to live fry, bypassing the stage of eggs is the main feature of the viviparous. After the birth of the fry, adult fish, you need to isolate, as adult viviparous individuals can take the fry for live food and destroy the hatchlings. To save fry, landed in the corners of the densely growing aquatic plants.
Guppy. This is a favorite of aquarists and children. Guppies — the most common viviparous. They are found in most aquariums. Males have more popularity than females because of their iridescent coloring. Almost all the male guppies have large bright tail fins, which may surpass in size all the fish. There are breeds with ball tail fin and long dorsal fin (it hangs on its side in the form of a tape). Interesting is the forked form of the tail in which the upper and lower rays abruptly lengthened relative to the middle of the tail. Breeders was bred breed guppies with elongated lower beam tail. But the female guppies prakticheskimi colored, dull and not have a significant diversity of colors. Continue reading
Sharks of the Mediterranean sea comprise about 47 species, 16 of them reach about three meters in length, and 15 species are considered potentially dangerous to humans. Among them are the white shark, considered the most dangerous of all. In other places, she usually eats everything what is on its way, but here she was acting towards people is very peaceful, preferring tuna.
Being an inland sea of the Atlantic ocean, the Mediterranean sea is distinguished by slow circulation of water masses and, consequently, slow the rate of exchange of waters of the Mediterranean sea with the Atlantic ocean, which makes a significant contribution to the maintenance of a constant temperature year-round. This circumstance creates ideal conditions for the existence of sharks. Continue reading
Everyone who ever was fond of scientific and popular works about animals, probably more than once met the stories about the huge pike that supposedly lived several hundred years. The most popular is the history of the so-called “kalbrosky the pike”, which was supposed to have been caught personally by the Emperor Frederick II, marked with a gold ring and released at 1230 in one of the lakes where caught running through 267 years. Despite the seeming plausibility of these stories, today reliably established that all of them should be classified as legends or fishing tales. The maximum age of pike, like most other fish, usually no more than 20-30 years. There are, however, fish are long-lived, and these include fairly common off the coast of Kamchatka Northern sea perch. Continue reading