Question

What is an air bladder?
A. Larva of Taenia solium
B. Swimming organ of amphibians
C. Hydrostatic or respiratory organ of teleost fishes
D. Excretory organ of teleost fishes

Answer 1

The species having air bladder is called climbing roost just as strolling fish, which is a little Asian freshwater fish of the request Perciformes. It is named so in light of their capacity to live and stroll about out of water. This fish is an air-breathing maze fish. It develops to around 25 cm (10 inches) rather than elongated, tannish, or green in shading. It essentially lives in lakes and dump however now and then it is seen for brief periods, "strolling" with a jerky movement.

Complete answer:
The swim bladder or air bladder, which is a buoyancy organ and is situated in the cavity of the body and derived from an out-pocketing of the digestive tube, is possessed by many bony fishes. This air bladder contains gas (usually oxygen) and serves as a hydrostatic or ballast organ that helps to retain the depth of the fish without floating or sinking upwards. This swim bladder acts as a resonating chamber in order to generate or receive sound. In certain animals, the swim-bladder contains oil instead of steam. In some animals, it acts as a lung or respiratory aid instead of a hydrostatic organ, but in certain bottom-dwelling and deep-sea bony fish (teleosts) and all cartilaginous fish (sharks, skates, and rays), it is absent.
Hence, option C, i.e., Hydrostatic or respiratory organ of teleost fishes is the correct answer.

Note: A special swim bladder called siphonophores helps the jellyfish-like colonies to float along the water surface as their tentacles trail below. In 1997, Farmer indicated that the lungs had developed to provide oxygen to the heart. Blood circulates to the skeletal muscle from the gills, and to the heart in fish just then. A benefit provided by the primitive lungs is that the cardiac shunt provides the heart with oxygenated blood. This hypothesis, the ecology of existing air-breathing fishes, and the physiology of existing fishes have been strongly confirmed by the fossil record.