More than 70 percent of the planet covered by water. Three-quarters of the oceans have a depth of over 800 meters. Here begins the realm of the infinite sea depths beyond our reach.
This unknown world is 90 percent of the habitable space of the planet. We know more about the surface of the moon than about the sea floor. In this eternal darkness, inhabited by strange life forms. Only a few decades ago it was thought that life at these depths is impossible, but today scientists believe that the first life appeared on the bottom of the ocean. Energy, resources, food and even the climate is influenced by oceans. There to decide the future of our planet?
Only with the help of latest technology it is possible to comprehend the mysteries of the deep sea. Deep research is long and expensive, so so slowly, the scientists shed light into the darkness. Costly expeditions to the most modern vessels ply the seas in search of answers. Continue reading
Though marine fishes drink a lot of water, their freshwater relatives don’t drink nearly anything. The root of this difference lies in the needs of fish to maintain a normal balance of salt and water in the body.
The water in the ocean three times saltier than its own liquid environment living in the ocean fish. As a result of a natural process known as osmosis, water body sea fish rushes out through the skin and gills. To compensate the lost liquid, saltwater fish forced to consume large quantities of sea water.
The concentration of salt in the body of freshwater fish exceeds its content in the surrounding water, which is why freshwater fish do not drink, like a sea, and constantly absorb water through the skin. The excess liquid they secrete in copious urination. Continue reading
Not all aquarium fish (and especially cichlids) so tolerant of their neighbors as ramirezi apistogramma and other dwarf American cichlids. Livable but not their only advantage, they are also very beautiful, they are interesting and, without exaggeration, meaningful behavior. That is why the fashion for these fish kept for many decades.
We all know that fashion is changing. In clothing from season to season, but in the aquarium it is slower. As a rule, the interests of the masses lovers of aquarium fish have time to change considerably over five years. Sympathy for some groups of fishes, having certain pronounced features that can steadily be maintained for decades. And yet, the process goes on. I remember the fashion for viviparous fish has been replaced by fashion for barbs, then became popular South American cichlids, and then a lot of people are fascinated by cichlids, but already African. Like any fashion, the fashion fish repeats. Continue reading