Goldfish (lat. Carassius auratus auratus) subspecies of the freshwater fish of the genus carp. Her ancestor was domesticated by the man in the VII century ad, and is one of the most popular aquarium fish, presented to a group of breeds of domestic aquatic animals, obtained as a result of centuries of hybridization and directional selection individuals with certain accidental characteristics, resulting from mutations. One of the obsolete naming all home and pond “goldfish” was “gold carp”, derived from General scientific systematic names, Carp.
The history of breeding goldfish Asia has at least a Millennium and originated from children’s hobby to collecting in which the housing was offered and developed in cages, in pens, in wells, in tubs and barrels for all small and medium animals — as the first kind of Pets at home. Continue reading
Like many animals living on land, the denizens of the deep need in each other. These bright yellow fish offer their services to many beings sharing their marine habitat.
Sea turtle, that serve fish-shiners or yellow zebrasoma. Photo: Doug Perrine
In the photos, made famous 59-year-old photographer-naturalist Arcs by Perrin (Doug Perrine) near the Hawaiian Islands, depicts a sea turtle, that serve these fish-shiners or yellow zebrasoma (Zebrasoma flavescens).
Sea turtles, like other inhabitants of the seas, you must regularly clean yourself from fungi, different organisms, harmful parasites or algae settling on them. However, they can’t do it yourself, so use the services of these bright yellow fish.
Fish-the cleaner can easily cope with this problem. For some fifteen minutes, it is fully possible to clean the tortoise shell. — Both parties benefit from such relationships, says the photographer, — One finds food, the other gets rid of the algae that had settled on her armour, and the armour makes it more streamlined. Continue reading
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