Randall, Allen, and Anderson (1987) cleared up the confusion between Pinjalo lewisi and the related P. pinjalo, which are very similar in overall appearance but differ in that P. pinjalo has 11 spines and 14-15 rays on its dorsal fin, 9-10 (usually 10) rays on its anal fin, and yellow pelvic and anal fins. Additionally, P. pinjalo appears to occur more around continental margins, while P. lewisi is more at home near oceanic islands.