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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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…

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How many teeth does a shark?
The shark is one of the most amazing animals, but the shark is one of the most dangerous predators of the water world. Sharks have a very interesting feature related…

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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

Fish monkfish
In the Atlantic ocean, the Black sea and off the coast of India dwells amazing and a bit scary fish monkfish .With it is associated a very curious phenomenon. For…

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Why should eat sea fish
Has long been reported that the dishes from sea fish should be on our table at least twice a week. Substances contained in fish, are needed to strengthen the skeletal…

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