What enables bony fishes to stay afloat at a particular depth without expending energy in swimming?

animal-kingdom
cbse

#1

(a)Bony fishes stay afloat at a particular depth without expending energy in swimming because their finned tail help in propulsion by lateral movements.
(b)Paired lateral pelvic and pectoral fins function as breaks and balances during swimming.
©The swim bladder is a buoyancy regulator. These characters enable a bony fish to stay at a particular depth without using energy in swimming