OSTEICHTHYES-SUPERORDER-TELEOSTEI

Mouth opening terminal,small.
Scales cycloid,ctenoid or absent.
Tail fin homocercal.
 A hydrostatic swim bladder usually present.
Advanced or modern ray-finned fishes.
ORDER 1. CLUPEIFORMES
Scales cycloid.
Head and operculum not scaled.
Fins without spines.
Tail fin homocercal.
Pelvic finsabdominal.
Air bladder withopen duct to pharynx.
No auditory vesicles.
e.g clupea,salmo sardinops esox notopterus.
ORDER 2. SCOPELIFORMES
Deep sea forms with phosphorescent organs.
Mouth wide with minute teeth.Swim bladder absent. Dorsal and anal fins with claspers.
ORDER 3.CYPRINIFORMES
Air bladder with duct to pharynx. ossicles present between airbladderand internalear.
e.g labeorohita clarius wallago electrophorus.
ORDER  4. ANGUILIIFORMES
Body long and slender,snake-like .
Scales absent.
Dorsal and anal fins long .
Pelvic fins present.
Air bladder .
e.g anguilla muraena(moray)