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adipose fin adipose fin present adults Africa anal fin anal fin rays Atlantic Australia barbels Body elongate bone branchiostegal rays catfishes caudal fin characiforms cladistic classification compressed ctenoid cycloid scales dorsal and anal dorsal fin dorsal fin rays eastern eels eyes Family fin absent fin base fin spines fin usually fin with three fishes Five genera five soft rays fossil Four genera four species fresh water Freshwater genera e.g. genus gill membranes gill openings Gosline Greenwood Indian Indo-Pacific Indo-West Pacific known larvae lateral line lateral line scales lower jaw Marine maxilla Maximum length mouth North occur oceans Order ostariophysans pectoral fin pelvic fins Perciformes Pisces placed premaxilla primitive protractile pyloric caeca recognized Rosen salmoniforms seven snout South America southern species e.g. spinous Subfamily Suborder Superfamily superorder swim bladder tail teeth Three genera three species three spines tribe tropical upper jaw ventral vertebrae western Zealand Zool