Known as a PACU, the "ball-cutter" fish has a set of chompers very similar to that of a human.
Usually found only in warm waters of the Amazon River, the Pacu, a relative of the Piranha, can grow up to a length of 90cm and a weight of 25kg.
So it came as a complete surprise when a 21cm Pacu was caught in an eel trap in Oresund Sound off the south coast of Sweden.
Although the Natural…
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