The video captures a vibrant underwater scene in an aquarium. There are several fish swimming around, including a yellow fish, an orange fish, and a blue and white striped fish. The fish are seen swimming in and out of the coral reefs, which come in various shapes and colors, including purple, pink, and white. The water is clear, and the lighting is bright, highlighting the colors of the fish and coral. The fish appear to be healthy and active, moving smoothly through the water.