OSTEICHTHYES-SCORPAENIFORMES

Enlarged heads and pectoral fins.
Projecting spines from gill covering.
e.g pterois(scorpion fish)
ORDER 12.PLEURONECTIFORMES
Bottom dwellers.
Body flat, lying one side.
Head asymmetrical ,both eyes present on upper or dorsal side.
Dorsal and anal fins fringing body.e.g
flatfish-pleuronectes,synaptura,solea.
ORDER 13. ECHENEIFORMES
Scales cycloid.
No air bladder.
Dorsal fins form a flat oval adhesive disc.
e,g echeneis or remora(sucker fish)
ORDER 14. TETRAODONTIFORMES OR PLECTOGNATHI
Strong jaws with a sharp beak.
Scales often spiny.
e.g diodon(porcupine fish),tetrodon(globe fish),ostracion(trunk fish)
ORDER 15. LOPHIIFORMES
Bulb like tip over head to lure prey into wide mouth.
luminescent organ present.
e,g antennarius(angler fishes)