How do fish breathe?

In a cozy corner of their home, Joe's father surprised him with a brand-new small fish aquarium. The aquarium sparkled with vibrant colors as two little fish swam gracefully within. Joe's eyes widened with delight at the sight of these aquatic wonders. As the days went by, Joe couldn't help but wonder about something that puzzled him. He had noticed that unlike humans, the fish didn't seem to struggle or die when they were submerged in water. Joe's curiosity bubbled over one evening as he peered into the aquarium. "Dad," Joe began, "I've been thinking. Why don't our fish friends drown in the water? How do they breathe?" His father and mother exchanged a knowing smile, realizing it was time to explain this fascinating aspect of nature in a way Joe could understand. "Joe," his father began, crouching down to his level, "fishes are specially adapted for living in water. They have gills, which are like tiny filters that help t...