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Serrasalmus geryi, known as the violet line piranha or Gery's piranha, is a species of piranha of the family Serrasalmidae. It is found in the lower Tocantins and Araguaia Rivers of Brazil . [ 1 ] [ 2 ] The species is notable for being the one of only the members of the genus Serrasalmus that can coexist with others of the same species in ...
Serrasalmus elongatus is a slender and elongated shaped piranha from the S. humeralis group. [1] It is commonly known as elongated piranha or pike piranha in reference to its shape. In its native range it is one of the smaller piranha species locally termed caribe pinche ("mediocre piranha"), like the iridescent piranha (S. irritans).
The name Megapiranha is a combination of the word "mega" in reference to the animal's large size and piranha, a common name for typically carnivorous members of Serrasalmidae. The word piranha itself is a Portuguese merging of words originating in the Tupi language and may have several meanings including "tooth fish", [ 5 ] "cutting fish ...
Red-bellied piranhas do not stay in groups in order to pack-hunt for larger animals, but instead group for protection against predators. Foraging methods vary throughout the different stages of a piranha's life. Smaller fish will search for food during the day, while larger fish will forage at dawn, in the late afternoon, and in the early evening.
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The black piranha occurs in a wide variety of habitats but the adults have a preference for the larger, deeper river channels where they normally hunt for prey either in deep stretches or in the vicinity of rapids. The juveniles are most frequently recorded in stiller stretches where there is thick submerged or marginal vegetation.
The sole documented case of such an incident, written in 1997, has been heavily criticized upon peer review, and this phenomenon is now largely considered a myth. [80] Pacus, South American fish related to piranhas, do not attack or feed on human testicles.
The dietary breadth of the wimple piranha is one of the narrowest reported for fishes; scales form an important proportion of the diet throughout most of its life, and adults feed almost entirely on them (see lepidophagy). In laboratory conditions, wimple piranhas are known to feed on scales from fish up to three times their own length, and are ...