179-- Osteichthyes 180-- placoid 181-- Flying fish 182-- 5 183-- Bony fish 184-- Betta -- Fighting fish 185-- trygon- torpedo 186- all are ccorrect 187-- both a and b 188-- clarias 189-- torpedo 190- both a and b 191- gnathostomata 192-amphibia 193- skin 194- gills 195- all of these 196- homodont 197- frog 198- all of these 199- option b