Aquarium goldfish – types, care
Goldfish is one of the most famous and popular subspecies of ornamental freshwater fish that belong to the genus carp. The history of the domesticated goldfish has many centuries –…

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Marine aquarium
Marine aquariums differ much more sensitive to any changes in the environment. The most important parameters for saltwater aquariums are pH, salinity and temperature. Occasionally the nitrite and ammonia will…

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Marine aquarium for beginners

You can create a fabulous world of warm tropical seas with amazing color, shape, behavior of exotic animals and fish.

Most lovers of the underwater world home with the fear of men looking at the establishment of a marine aquarium. They are frightened not only the financial side but also many obscure points.

To create a saltwater aquarium any aquarium factory manufacturing. The market offers a large selection of aquariums from leading Russian, European and Asian manufacturers. The only difference is in the configuration of some of the aquariums lighting and filter elements.

Choosing an aquarium is an individual matter. Does not matter, what shape, what capacity and what kind of glass your tank will be, but there is one mandatory rule: the frame should be metal and have a reactive putties. Sea water is an aggressive alkaline environment. It must not contact the metal parts all over through the filtration systems. Continue reading

About fish

Our planet is inhabited by almost 20 thousand species of fish. About 1/10 of them are commercial. They give people a lot of valuable products: food, medicines, fertilizers for the agriculture, pet food, industrial oils, raw materials for light industry.

To move in the water, have to spend a lot of energy. Nature took care of the fish, giving their bodies zaradougou streamlined shape. The speed of the fish (scombridae, tuna, sharks) in its form and speed resemble that of a torpedo. The fastest fish is considered fish-sailfish, swordfish and Marlin, which reach speeds of up to 130 km/ h. The rate of freshwater fishes is typically lower, but in critical moments of his life, in the moment of impending danger or in the event of an attack on their prey, they can take a short term shot at a speed of 1-2 km /h. Good speed swimmers usually are found in rivers with current (sabrefish, Chub, nase, Dace, salmon). The speed of the fishes living in stagnant water far below, but they are more nimble, nimble (carp, bream, Rudd). Continue reading

Oceanic nekton

The ocean abounds with excellent swimmers who, in the words of the famous German nineteenth-century biologist Ernest Haeckel, “free to find their own way”. They can resist the strong current of water and to choose their own way, different from the animals of the plankton. The combination of these actively swimming animals E. Haeckel called the nekton, which means “floating”. Technically, the nekton are aquatic snakes, birds, and animals, but here we will talk only about the two groups of nektonic organisms — the fish and cephalopod molluscs.

Important nektonic animals adaptations to life in the water column of the ocean, according to Professor Yuri Aleev are maintaining the body in a suspended state, creating a driving force, reducing the resistance of the counter flow of water, control the movement of the body, as well as in the ability to disguise and protection. Continue reading