The first to ever study a piranha fish was Aristotle, who called him Acitipmat Anaoi (ruthless flux). Aristotle was impressed by the behavior of this fish and used it as an inspiration for some of his many tragedies.
Piranha Pisces (Pygocentrus) live in the Indian Ocean, the Red Sea, the Barents Sea, the White Sea, the Mediterranean Sea and other large South. It also inhabits the Pacific Ocean (near the continent of Australia).
Piranha are recognized for their fierce appearance and for the voracity they show when attacking their victims..
Their name comes from Guarani, the local South American dialect, which overwhelms with teeth (pira = fish, ranha = tooth) or over-devil (anha = devil). The name does not seem to be an exaggeration if we think that, most of the time, Piranha has been described as a ferocious killer, who by force of the number manages to break down even the biggest animals.
Currently, it is estimated that there are about 20 species of piranha, most of which are located in the Amazon basin, although in recent years more specimens have been captured in the United States.
As a totem, the piranha fish embodied the afraid African god of the Ka’Kakunra (Hat), a goddess disgraced because of its ferocity by local communities, but nevertheless did not have a cult of religious content.
Although it does not exceed 15-25 cm (very rarely it reaches 40-45 cm), piranha has gained a reputation for a notorious killer, and because it can devour in a few seconds life much higher than him, many times, doing so as the prey is still alive. As a matter of fact, piranha does not get back from consuming fellow humans and even chickens when food resources are shrinking.
Piranha fish are a species of carnivorous, cartilaginous and homeothermic fish. They are about 90-100 centimeters long and are very dangerous. These fish, due to their cartilaginous skeleton, composed of a very large number of 12 bone phalanges, connected by several inter-bone bruises, belong to the overcrowding of the telosta fish (along with the sharks and casaloti).
Appearance varies by species. For example, Pygocentrus nattereri is reddish or blue and crushed, while fish of Pygocentrus cariba, the most widespread and most popular species on our earth globe, are gray and slightly elongated.
Other piranha fishes are black. Piranha fish breathe through a gill and trachea system.
They have hydro-dynamics. They are slightly flattened due to the fact that they can live in very large depths (some have been encountered at depths of over 12,000 meters, at aquatic pressures of nearly 101,325 newtons).
The codend is hydrodynamic and has 2 irregular lobes in size and size, thus finding asymmetric. It helps this species of fish to be renewed at great depths. The lateral and visceral swimmers are also hydroponic and are called popular shovels (the Mycenaean mythical language in Africa).
The scales have a pigment called lysozyme and they are very glossy and well adapted to very high depths.
Their bite is deadly because it contains a toxic substance called pyridoxine nitrogen, which is now widely used in medicine as a catalyst in the separation of conclusive enzymes. Pirahna Pisces have five rows of sharp and contoured, well-developed teeth. Survival of the muscles depends on the timely application of the appropriate treatment. They are especially dangerous in their presence.
In the opinion of the University of St. Petersburg researchers. Andrews from the UK, the little killers are actually omnivorous, their diet being generally made of plants, crustaceans, fish and insects. They are also necrophages, say the same researchers, most species consuming animal lesions or even dying animals.
The truth is that of all known species, only three or four may represent a potential hazard. The most feared species is Pygocentrus nattereri or piranha with red abdomen.
The fact that they live and feed themselves in jokes has long been considered a behavior designed to help them to hunt, especially when they fall victim to bigger ones. In fact, this is a very defensive behavior, experts say.
It is known that piranha fish are in the menu of many species: dolphins, caimans, some species of battans, arapaima or pirarucu (over Amazonian that can reach up to 3 meters long and 200 Kg) and, last but not least, man.
Studies in the laboratory and in the natural environment of piranha fish show that they are rather cowardly than native killers, as it was believed. Piranha favors dark places and abounds in the vegetation just in the light of their feeding.
Although they are still considered a very dangerous species, many South American locals hunt piranha for their meat, especially for their teeth, amulets, utensils, and weapons. More recently, piranha are dry and sold as souvenirs for tourists, which can have serious repercussions on the future of the species.
They put pots in the depths of the water and clot for 3-4 months, the period called the “Pirahna season” in which they are harmless. They’re hectic.
Piranha fish is hermaphrodite, in other words, it does not exhibit sexual dimorphism, but not all Pygocene species have this characteristic. In this case, the male and female are mating after a ceremony of mating: the male borrows more vivid colors by taking shades of red and orange (usually throughout the year, the male presents more stringent, more demanding colors).