The New Encyclopaedia Britannica: Macropaedia : Knowledge in depth

Africa agriculture America anal fin animals areas Atheriniformes Beryciformes bladder blood body bone bony bottom breeding catfishes caudal fin cells centimetres chemical chondrosteans classification Clupeiformes countries crops culture dances Devonian disease dorsal fin eggs elongated Eocene Europe excretion farm feed ferns fertilizer Finland Finnish fishes folk music fossil freshwater function gametophyte genera gill glomerulus harvest important increase jaws kidney kilograms kinship land larvae launched leaf living lower lungfishes male marine marriage metres millimetres modern mouth North occur ocean orbit organs pectoral fins pelvic fins percent perciforms plants primitive production protein rays regions relatively renal salmoniform satellites scales seed sharks snout social soil space spacecraft species spines sporangia spores structure Suborder surface swim swim bladder tail teeth teleosts temperature tion tissue tropical tubule United upper urine usually varieties vegetables vertebrates vessels whaling