Fish of the Black sea
Katran - black (Squalus acanthias ponticus) Reaches a body length of 2 m (usually 1.5 m). Found only in the Black sea waters to depths of 60 m. Attention. All…

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The truth about modern fish. Explain why cheap fish better.
Pros: tasty, inexpensive, very useful Someone in my family loves fish. I have therefore tried many kinds of fish and ways of cooking. And in this case, the issue price…

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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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rivers

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

Do all fish spawn?

Most fish lay eggs, and it is fertilized outside of their body. Fish that spawn, are called oviparous. But some fish give birth to live fry. Such fish are called viviparous.

To live-bearing are guppies, sword fish. The eggs of these fish are fertilized inside the mother’s body and develop there until the fry. At a certain time they are born. This happens 21 days after fertilization.

The number of eggs, fertilized and deferred, differs greatly depending on the type of fish. Some fish lay eggs and abandon her, without showing her any more interest. This is a fish that produce huge amounts of eggs. Those fish that look after their young, they lay only a few eggs.

Caviar can be of two types. One kind of eggs floats on the water surface, the other sinking. The caviar, which floats, is called pelagic. It is usually tiny, bright and contains a lot of protein. Caviar, which is sinking, is called Donna. It is usually harder and more protein in it. Continue reading

Amazon com the Arkhangelsk province

Fishermen in the Arkhangelsk region took out a strange catch in the area of ferry crossing Bereznik and aspen: they pulled from the water an unusual fish with the head of a turtle and fossilized scales.

According to the newspaper “Dinovite”, the fish has a head like a Brontosaurus, and also a large barbed needles and petrified of the scales. Its mouth looks like a suction Cup, similar to the mouth of sturgeon. The fishermen studied the various pictures on the Internet, but found no mention of such unusual instances. However, similar features are observed in fish such as sea hare and monkfish.

Later, the fish was identified, it became clear that this brocade pterygoplichthys, or armored catfish. He eats algae, and it plant aquarists. The habitat of this catfish – the water of the Amazon and Orinoco.

Recently anglers and ichthyologists meet more and more exotic species in the rivers of the middle zone of our country. In 2012, about catching the same armored catfish reported in the press Penza: Continue reading

Scorbanova Family (Scorpaenidae)
Representatives of the family Scorpaenidae are widely distributed throughout the tropical seas and temperate. Several species also occurs in Arctic waters. Many scorbanova reach large sizes and are considered commercially…

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Preparations for the care of water in the garden pond
Algae is a natural part of any body of water, including garden ponds. As one of the most important parts of the food chain, they are the basis of life…

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