Once the meal begins, piranhas dart in and out to bite their prey at great speed to avoid being accidentally nipped by another individual, according to the Sea Life London Aquarium. "Because their teeth are so sharp, a single bite cause a lot of bleeding and trigger group feeding frenzy behavior." "An attack is likely to have been caused by presence of blood in the water, skin injuries or movement that appears as a fish in distress," Buckup said. The IBTS also provides testing and tissue services to hospitals and is. The attack in Tarumã-Açu could have been triggered by a single piranha mistaking a foot for food, taking a mouthful and drawing blood, which in turn sparked a feeding frenzy. The IBTS is the statutory body with responsibility for the national blood supply. "Feeding piranhas in a tourist setting strengthens their natural behaviors to school and bite," Mark Sabaj Perez, an ichthyologist at the Academy of Natural Sciences of Drexel University, Philadelphia, told Live Science in an email. The presence of bathers in a feeding spot, however, can lead to confusion and aggression. "They may attack other live fish or animals, but they will eat dead flesh whenever it is available." Some specialize in eating fish scales and nibbling the fins of other fish," Buckup said. At that point, the number of the marchers had swelled to 600 as they crossed the span from Selma toward their. Church in Selma and proceeded through town to the Edmund Pettus Bridge. "Some species of the piranha family eat only fruit, insects and vegetable matter. on Sunday, March 7, 1965, 300 protestors, led by Hosea Williams, John Lewis, Albert Turner and Bob Mants, gathered at Brown Chapel A.M.E. Most piranhas are harmless and the meat-eating species tend to scavenge rather than hunt living animals.
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