Here are some picture of an extremely neat Pink Pacu. I had never heard of them before until recently. The Pink Pacu are at the bottom of the link posted here.
http://www.johnpetchey.co.uk/Guyana2.htm
They have got the body structure of a giant Myleus schomburgkii.
http://www.johnpetchey.co.uk/Guyana2.htm
They have got the body structure of a giant Myleus schomburgkii.