The content of the fish in a saltwater aquarium can be very challenging. Maintenance of the necessary salinity of the water and a sufficiently high oxygen level in it even in a well – equipped aquarium is not easy. Most marine fish bred in aquariums, is habitat, so these fish cannot tolerate fluctuations. Reef the oxygen level is always high and a lot of light, because the corals grow only in shallow and clean water.
Sea water is very corrosive, so the aquarium must be made entirely of glass or plastic, without metal parts. Although marine fish are less inclined to jump out of the vessel compared to freshwater, the aquarium must be carefully closed to avoid contamination. It will also help to control evaporation: when water evaporates, salinity increases, so the vessel should be topped up with distilled water. 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 I remember the fashion for viviparous fish has been replaced by fashion for barbs, then became popular South American cichlids, and then a lot of people are fascinated by cichlids, but already African.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
Living in the depths of the North Pacific ocean macropinna the Smallmouth has a very unusual appearance. Her transparent forehead, through which she could spy out the production of their tubular eyes.
Unique fish opened in 1939. However, at that time did not work well enough to study, in particular the structure of the cylindrical eyes of the fish, which can move from vertical to horizontal and Vice versa. It was done only in 2009.
Then it became clear that the bright green eyes of this little fish (it does not exceed 15 cm in length) are filled with a clear liquid chamber of the head. This camera covers a dense, but at the same time elastic transparent membrane, which is attached to the scales on the body of the Smallmouth macropinna. Bright green eyes of fish due to the presence of a specific yellow pigment. Continue reading