The Number – Cypriniformes
Family – Priniv
The genus/Species – Serrasalmus nattereri
Length: average 20 cm, in some species up to 50 cm.
Mass rarely exceeding 1.5 kg.
Caviar: a few thousand eggs.
The incubation period is 10-15 days, depending on water temperature.
Habits: constant float huge flocks.
Food: primarily fish; attack mammals, floating or come to the waterhole, and birds.
18 known species of piranhas, 4 of which are dangerous to humans, although fatal cases have been identified. Continue reading
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 behavior alternate with phases of slowing of physical functions – this is the dream fish.
Dream fish is different from our understanding of sleep. Structural features and habitat not allow the fish to fall into a state in which they would be completely disconnected from reality. In such a state is immersed most mammals during sleep. The fish also during sleep, the brain activity remains unchanged, – they are not able to fall into a state of deep sleep.
This feature and may cause the issue: how do aquarium fish sleep?
Studying the behavior of aquarium fish, you will notice that at certain times the fish are almost motionless, transfixed in the water. This is the sleeping fish. During sleep, the fish usually drift without active movement. But the slightest influence of external factors leads fish into an active state. Continue reading
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 of not standing in the first place.
At first, I often bought salmon. She is tender, beautiful and expensive.
Tried to buy tilapia, sea language, sea bream, trout, carp, catfish, pike, sturgeon, hake, and do not list.
Later read a lot about what fish to bring us where it was harvested, the conditions in which it inhabits. And found a bad moment.
It turns out that in addition to dividing the fish of the sea and river, the fish is divided more and growing conditions. So, fish is artificially grown and living in natural conditions.
Fish grown in razvodnyh (fish farms), to put it mildly, is not subject to the use. Fish live in artificial ponds in a large quantity, often in dirty water, fed unnatural feed, is constantly sick. Therefore, it is continuously fed with antibiotics (to prevent mass mortality), as well as growth hormones (to quickly sell the fish maximum weight. Continue reading