Bony fishes are

Fishes having a swim bladder,which does not have direct communication with the exterior and where the resorbent and secretory parts are not sharply separated from one another,are called:

Match the following columns regarding bony fishes (Osteichthyes):

Column-$I$ (Habitat/Type)	Column-$II$ (Examples)
$P$. Marine	$I$. Flying fish,Seahorse
$Q$. Freshwater	$II$. Rohu,Catla,Mrigal
$R$. Aquarium	$III$. Fighting fish,Angel fish

What is the reproductive nature of bony fishes (Osteichthyes)?

Assertion $(A)$: Fish live in water.
Reason $(R)$: Fish are adapted to aquatic environments.
Which option is correct for Assertion $(A)$ and Reason $(R)$?

Which one of the following is an example of a lung-fish?