[2] P. flavipinnis grows to a length of about 34 centimetres (13 in) SL.

[2] These fish migrate upriver during June and July.

Seeds and coarse sand grains were found in the stomach of one specimen, while another had a stomach full of aquatic insects.

[2] In central Brazil they are caught by commercial fishermen through the use of lampara seines.

[2] They are also exploited as they migrate upstream during June and July.