Typically, sharks are considered extremely dangerous animals, and call it being an ordinary fish is sometimes more than difficult. This is not surprising, because, just look at the size of that “fish” and the number of teeth in her mouth. Indeed, virtually all species of sharks are predatory animals. It is immediately noted that there are about 450 different species. However, there are sharks that are as food prefer small fish, plankton, who lives in the water, etc. in Other words, some sharks are natural purifying devices for water. As it turned out, sharks can live not only in seawater, i.e., salt, but also in fresh waters. However, this ability is given not to all representatives of this genus of animals. In this game we will talk about predatory sharks that feed on large species of aquatic creatures.
Moreover, sometimes they are not averse to eat people if they are nearby. The game shark is one fish mysteriously swam in the waters of the river called Thames. It flows through London which is the capital of great Britain. At this time you have to control the movements and actions of a Continue reading
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
The structure of the pharynx is also closely linked to feeding habits of fish. As indicated, the number and structure of Gill rakers may be very different — from a few small hard bumps predatory fish to a complex network of frequent rakers in silver carp — Hypophthalmichthys molitrix (Val.), litumelo planktonic algae. The mullets — Mugili – dae — muscular throat adapted for crushing lisovogo clump, consisting of detritus and vegetation. Some fish developed teeth on the pharyngeal bones. Some they are on top – and ninepatch bones, as, for example, wrasses — Labridae, or only ninepatch, as, for example, cyprinids — Cyprinidae.
Haeckel (1843) divides nizhnelomovskie teeth of cyprinid by the nature of the structure related to their function into four types:
1) hollowed — excavati, a type of Longhorn beetle,
2) chewing — mastic torii, a type of carp, Continue reading