Swim Bladder

What is the main function of a fish's swim bladder?

• To help them breathe underwater

• To help them maintain a specific depth without much effort

• To protect their internal organs

How do fish with open swim bladders typically adjust their buoyancy?

• By gulping air at the surface and expelling gas

• By rapidly moving their fins

• By changing their body temperature

How do fish with closed swim bladders adjust their buoyancy?

• By gulping air from the surface

• By diffusing gas to and from their blood

• By changing the density of their bones

Which of the following is NOT a method fish use to manage buoyancy, as described in the video?

• Using a swim bladder

• Staying on the bottom of the ocean

• Rapidly flapping their fins