Order under Subclass Actinopterygii, under division Teleostei, under subdivsion Euteleostei, under superorder acanthopterygii, under series Percomorpha 

Order weakly united by:
 Presence of suborbital stay, a posterior extension of the
third infraorbital bone.
 Head and body tend to be spiny or have bony plates.
 Pectoral fin usually rounded, with membranes between lower
rays often incised.
 Caudal fin usually rounded (sometimes truncate).

Order under Subclass Actinopterygii, under division Teleostei, under subdivsion Euteleostei, under superorder acanthopterygii, under series Percomorpha 

• Monophyly of group questionable.
• Order weakly united by the derived fish condition, although there are
many exceptions

Order under Subclass Actinopterygii, under division Teleostei, under subdivsion Euteleostei, under superorder acanthopterygii, under series Percomorpha

Order united by:
 Adults not bilaterally symmetrical (one eye migrates to the other
side of cranium).
 Dorsal fin extending forward to lie above the cranium.
 The presence of a recessus orbitalis, an accessory organ allowing
for protrusion of the eyes above the body to maintain vision while
buried in the substrate.

Order under Subclass Actinopterygii, under division Teleostei, under subdivsion Euteleostei, under superorder acanthopterygii, under series Percomorpha

Order united by:
 Reduction or loss of multiple skull bones.
 Scales usually modified as spines, shields, or plates.

Order under Subclass Sarcopterygii, which is the subclass of Infraclass Ceolocanthamorpha

-Subclass Sarcopterygii
                 -Infraclass Ceolocanthamorpha
               -Order Coelocanthiformes

Order under infraclass Dipnoi, which is under subclass Sarcopterygii

-Subclass Actinopterygii
-Division Teleostei
            -Subdivision Euteleostei
                     -Superorder Acanthopterygii
              -Series Percomorpha