Percopsiformes

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.
 * See Fishbase.

Families in this order:
 * Amblyopsidae
 * Aphredoderidae
 * Percopsidae