The long-awaited relaxation of mind and body vacation. You go to sea, to warm side, to enjoy the sea climate. But remember that the sea is not so safe place to stay. Sea creatures every year manage to spoil the rest 160 million people. They do not spare the health of neither women nor children nor the elderly.
The further South you go, the more dangerous jellyfish
The most harmless jellyfish that “the Russians” and “Ukrainians”. Stinging nettle is not the strongest and highlighted them mucus harmful only if it enters the eyes. In the coastal waters of the Canary Islands waiting for the unwary bathers pirate – Portuguese boat, a very beautiful jellyfish with a red crest and multicolored bubble-sail. Many jellyfish live in the coastal waters of Thailand. The Australian sea wasp kills with a light touch tentacles, which, by the way, can wander in and of themselves, without losing the murderous qualities. Pay for familiarity with the sea wasp, at best, severe burns and lacerations, at worst – life. “Kiss” tropical jellyfish spoil your appearance for 5-6 weeks. The affected area should be lubricated with food vinegar and to remove adherent tentacles. In the future the affected area to lubricate sintomitsinovoy emulsion. In severe cases need injection obezbolivauschaya. As a prevention you should know that the jellyfish after a storm beaten shore. Continue reading
Fish farming, practiced in Ancient Egypt, as evidenced by the sources dated about 2000 BC, over four thousand years ago. In Mesopotamia, in temples the priests kept the fish in ponds. Fish were kept in ponds in ancient Rome and Greece.
But only in China began to engage in purposeful breeding of different breeds of fish, which we know under the name goldfish.
To the right is a detail of a mural in Egyptian tomb, which depicts a pond with fish
Goldfish is the usual subspecies of the goldfish ( Carassius auratus ). It is assumed that the subspecies living in China, was separated from the rest of toothcarps formed millions of years ago mountains. This subspecies, which is West of the Himalayas is not found, when it was developed ornamental goldfish.
Left – map showing the distribution of toothcarps ( Cypridontae ), to which the goldfish belongs, and the primary habitat of a goldfish. In the wild this fish niceley rivers, lakes, ponds and all dents filled with water. Carp undemanding and can live in flowing and stagnant water. In nature, fish may have different color variations, depending on ambient conditions. The most important of these conditions is light. Continue reading
Viviparous fish are among the most popular aquarium fish species. Earned its popularity because of the ease of breeding in aquariums, even without any special conditions. Main popular representatives of the species: guppies, swordtails, and platys mollienesia. Due to the ease of breeding, viviparous fish have been widely disseminated among breeders. They are called viviparous, because they don’t spawn and immediately throw the fry, they develop the female in the abdomen after fertilization by the male of the female. Other viviparous fish kept in aquariums more often. They are less popular because of the modest color or bad habits — excessive aggressiveness or jednosti.
Sex differences viviparous:
Anal fin of females have fan-shaped. Anal fin of the male has the appearance of a twig (gonopodium) and can rotate in all directions.
Mosquitofish. A male and female.
Conditions viviparous fish:
Almost all types of viviparous fish will be suitable tank volume 100 litres, planted with aquatic plants. Some viviparus, for example mollienesia, doing a good job with small growths of algae on the plants, thereby helping us in cleaning and maintaining an aquarium. But there are those types of viviparous fish that don’t mind to eat some plants, especially tender leaves. Continue reading