Marine aquarium maintenance fish marine aquarium
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…

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About the benefits of fish and fish oil
Did you know that eating marine fish prolongs life . All sea products and sea fish. especially salmon, tuna, sardines etc are rich in fatty acids omega – 3. Fish…

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Aquarium fish catfish
This species belongs to the family of Armored catfish, Callichthyidae or Kalligrafie This family is included in the squad SOMO-shaped (Siluriformes). Members of the family — small fish that live…

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scientists

Piranhas river monsters

The Number – Cypriniformes
Family – Priniv
The genus/Species – Serrasalmus nattereri

Basic data:
SIZES
Length: average 20 cm, in some species up to 50 cm.
Mass rarely exceeding 1.5 kg.

REPRODUCTION
Spawning: March-August.
Caviar: a few thousand eggs.
The incubation period is 10-15 days, depending on water temperature.

LIFESTYLE
Habits: constant float huge flocks.
Food: primarily fish; attack mammals, floating or come to the waterhole, and birds.

RELATED SPECIES
18 known species of piranhas, 4 of which are dangerous to humans, although fatal cases have been identified. Continue reading

How fish breathes?

Hundreds of thousands of years ago, long before the appearance on Earth of man, the oceans already swam fish. At that time they were the most highly developed creatures.

Since then, they began to develop a variety of ways so that now only some species only vaguely resemble the first primitive ocean fishes.

As a rule, fish has an elongated and tapering shape. People have copied it in the construction of ships and submarines, as it is the best adapted to movement in water.

Most fish use their tail as a motor. With the help of fins and they control their movements. Except for one species of fish, all the others breathe by means of gills. Fish swallows mouth water that passes through the gills and out through the hole. Water also contains oxygen, and it through the gills into the blood of fish, as the air through the lungs in the blood of man. Continue reading

Herring

Typical representatives of the nekton is the herring. It is well known that this fish has great commercial value. Until comparatively recently, it was promyshlyali in such large quantities that its price was very low, despite excellent taste and nutritional quality. In recent years, due to the sharp increase of the fishing fleet and introduction of intensive methods of production occurred overfishing. The number of herring in the oceans have decreased dramatically.

If in the future the intensity of the herring fishery will increase or even remain at current levels in the coming years, this valuable food fish will become a Museum rarity. Reduction of stocks of herring and concerned consumers and fishermen, but the first sounded the alarm scientists.

The appearance of the herring is well known to everyone, but it is unlikely that the layman can easily distinguish one kind of herring from another: the difference between them for the untrained eye to be insignificant. Species differences are not only in the details of the structure and the size of the fish, much deeper than they differ from each other in biology, numbers, distribution. Therefore, the fishery for mackerel fishes should be strictly subordinated to scientific data, to each type needs special approach. Continue reading

How do you sleep aquarium fish?
Watching fish in an aquarium, you'd think they never rest or sleep. In the understanding of man, they are in constant motion. However, like all animals, fish periods of active…

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Mediterranean sea on the brink of ecological disaster
No one doubts that the Mediterranean sea is one of the most beautiful seas of our planet! Anyone who has ever been lucky enough to see the fabulous beauty of…

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