* Bubbles are air, and fish need water: Fish breathe oxygen dissolved in water, not air. They have gills that extract oxygen from the water. If they try to swim through air bubbles, they would suffocate.
* Bubbles can be obstacles: Bubbles can block a fish's path, especially if they are large or numerous. Fish might swim around or under them to avoid them.
However, there are a few situations where fish might interact with bubbles:
* Playing: Some fish, like goldfish, might curiously swim around or even through small bubbles, perhaps because they find them interesting.
* Aerated water: In aquariums, air stones are sometimes used to aerate the water and create bubbles. Some fish might enjoy swimming in the bubbly water, but it's not essential for their survival.
* Bubbles from movement: If a fish swims quickly through the water, it might create bubbles around itself.
Overall, while fish might interact with bubbles in some situations, they don't typically swim *through* them in a way that would be beneficial or even possible.