A Danish professor said a South American fish was found in Danish waters . He said the fish may attack male private parts , but now he says it was a joke . Comment: There is no record of them attacking humans , the expert says .
A Danish professor said a South American fish was found in Danish waters . He said the fish may attack male private parts , but now he says it was a joke . A fish expert says the fish are vegetarian and do n't swim in saltwater . There is no record of them attacking humans , the expert says .