Piranha let loose in Berlin aquarium petting pool BERLIN (AFP) – Berlin aquarium staff were startled to find that a carnivorous piranha fish was recently released in the facility's petting pool for children, Germany's most widely read newspaper, Bild, reported. The piranha, whose teeth can grow up to two centimetres (three quarters of an inch) long, had already begun taking bites out of other fish when it was found and transferred to another aquarium, curator Rainer Kaiser told Bild. He said the fish was so rapid that staff had to empty the pool, where children can stroke the fish swimming…