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Percopsiformes: Premaxilla nonprotractile; ectopterygoid and palatine with teeth; pelvic fins, if present, behind pectorals and with 3-8 soft rays; spines (normally weak) usually present in dorsal fin; many species with ctenoid scales; six branchiostegal rays; 16 branched caudal rays; orbitosphenoid, basiphenoid, and suborbital shelf absent; vertebrae 28-35.

Families in this order: