Question

Объясните, как рыбки легко могут изменять глубину погруже­ния?

Answer 1

изменяя объем воздушного пузыря(особый орган у рыб)

Answer 2

У рыб есть плавательный пузырь, который они могут произвольно немного сдуть и опуститься, или наоборот надуть его кислородом и подняться 

Answer 3

How Fish Can Easily Change Depth of Submersion

Fish can easily change their depth of submersion through various mechanisms such as swim bladders, fins, and body density adjustments.

Swim Bladders: Fish use swim bladders, which are gas-filled organs, to control their buoyancy and, consequently, their depth in the water. By adjusting the amount of gas in their swim bladders, fish can easily ascend or descend in the water column.

Fins: The movement of fins also plays a role in helping fish change their depth. By adjusting the angle and movement of their fins, fish can control their direction and depth in the water.

Body Density Adjustments: Some fish can also adjust their body density to change depth. By altering the amount of lipids or oils in their bodies, fish can become more or less buoyant, allowing them to move up or down in the water.

These mechanisms allow fish to easily navigate and change their depth in the water, enabling them to adapt to different environmental conditions and find food or avoid predators.