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
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 a long time researchers could not understand why all the water harvested from fish of this species are invariably females. As they multiplied.
Only after the beginning of the heavy deep-sea studies have found out that monkfish has developed a unique mechanism of reproduction. It turned out that the male and female fish monkfish differ in size a thousand times. The female is a large part of his life spent in the coastal zone and can grow up to two meters long, and the male also reaches only a few centimeters and lives at great depths, where is the justice in this world = ( . This was established when he was discovered living at depths of more than two hundred meters tiny fish acerated. Caught deep-sea dredges of acaracide were always males. Only after painstaking research revealed that acerated is (many readers probably already guessed it) a male sea devil, and not a separate species or a subspecies.
To find such a small male helped another feature of the sea devil — the annual migration of huge females on the depth taken by them for the purpose of procreation. Continue reading
Fish-LiveDrive our rating of the most unusual inhabitants of the deep and dangerous at the same time, amazing lionfish, also known as striped lionfish, or Zebra fish. This lovely creation is long about 30 inches most of the time among the corals in a stationary state, and only from time to time, swims from one place to another. Thanks to the beautiful and unusual color, and long fan-like pectoral and dorsal fins of this fish attracts attention, both people and marine life.
However, for beauty of coloring and shape of her fin and hidden sharp poisonous needles, which it protects itself from enemies. The lionfish does not attack first, but if a person accidentally touches it or steps on it, from one injection that needle he has dramatically worse health. If there will be several injections, the person will need outside help, to swim to shore, because the pain can become unbearable and lead to loss of consciousness. Continue reading