Learn how to say Perciformes correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word perciform:
relating to fishes of an order (Perciformes) that comprises those resembling the perches. This is the largest vertebrate order and includes nearly half of all bony fishes.
a perciform fish.
late 19th century: from modern Latin Perciformes (plural), from Latin perca ‘perch’ + forma ‘shape’