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…

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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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The blue Marlin
The blue Marlin is one of the largest fish in the world ocean. It can weigh up to 800 kg, with a length average body length of 200 to 300…

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size

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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

Marine aquariums

Marine aquariums can be divided into several types, depending on the animals that inhabit coral reef, fish, mixed and thematic.

Of course, the most memorable and prestigious, but at the same time, the most difficult to maintain coral reef .

The reef can be represented by soft or hard corals. In addition corals in the reef there are sea anemones, anemones, and many other subjects, including it might as well be fish, but usually small, inconspicuous and completely in a small amount.

Under natural conditions, the corals are in perfectly clean water, so we need to take seriously the issue of water quality, to reproduce and maintain the same properties of the built environment in a marine aquarium. In addition to special complex filtering system, the so-called “living stones” perfectly fulfill the role of water purification, both as a design element and substrate for corals. Another important focus in the marine aquarium – quality and correctly chosen spectrum lighting. 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

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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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Striped Marlin.
Tetrapturus audax (Latin), Striped Marlin (eng), Red marlin (Japan) Distributed in tropical and warm temperate waters of Indian and Pacific oceans. Striped Marlin is pelagic fish and performs seasonal migrations,…

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