What sizes, shapes and colors do not exist in nature among the inhabitants of the underwater world! To date there are over two thousand known species of fish, and how many more hidden in the unexplored depths of the oceans, seas, rivers and lakes.
Nothing compares the beauty of marine fish. The nature endowed them with so amazing colors that only wonder. And still people continue to surprise with new discoveries. So, for example, recently found one more new species of fishes, representatives of which glow in the dark like fireflies – amazing fish!
Unfortunately, to keep saltwater fish in aquariums is very difficult. Until recently, the presence of marine aquariums even zoos were considered “aerobatics” aquarium. Only in those countries where there was direct access to sea water, could be seen in aquariums of marine fish, and even then, the most common and less whimsical. As for what to say about the countries where sea can be seen only on TV! Continue reading
The main methods of intensification of pond fish farms are feeding fish and fertilizing ponds with increased stocking density of fish per unit water area. Natural forage base of the pond with increased stocking density of fish was not enough; she can no longer provide favorable conditions for feeding and growth of fish. In order for the fish planted in the pond on the increased norm, grew well and by the autumn had reached the standard weight, it is necessary to additionally feed her fodder mixtures and to simultaneously increase the stock and utilization of natural fish food by fertilizing the ponds, application of mixed landings of fish and other ways.
Range of feed for pond fish is quite large. They can be divided into feed of plant and animal foodstuffs. As plant feeds for fishes used most often wastes of different crops (barley, rye, wheat, corn) and legumes (lupine, soybeans, lentils, peas). Grain feeds rich in carbohydrates, legumes – proteins. Apart from them, are widely used for feeding fish different kinds of food, and even housing polikarpovich oilseed meals and cakes: sunflower, hemp, safflower, rapeseed, cotton, flax, etc. Continue reading
One of the brightest and most beautiful families of marine fishes, the calling card of coral reefs, has 10 genera and 130 species. In classical works of butterfly fish are often combined with fish-angels, are not inferior to them in beauty and brightness of color, with whom they have many common morphological features. Butterfly fish distributed mainly in the Indian and Pacific oceans, however they are found and the Atlantic, not only in tropical and subtropical and in temperate waters. All species found in the coastal strip, mainly inhabiting community of coral reefs and rocky outcrops. They are very conservative, do not make migrations and adhering to the same area in a lifetime. Live alone, not forming flocks and swarms. Are a daily way of life. These fish feed on various invertebrates, which are usually extracted from the crevices and other hideouts, to collect on the surface or reefs eat parasites from the skin of large fish.
Medium-sized fish, 7 to 30 centimeters, with high, strongly compressed laterally body. Rostral part of the head elongated into a tube, at the end of which is a small mouth. Dorsal fin undivided, stretches along the torso, sometimes has an extended front end, resembling a pen. Continue reading