The video shows a purple and yellow fish swimming in an aquarium. The fish is seen swimming around the rocks and coral in the tank. The aquarium is well-lit, and the water is clear, allowing for a good view of the fish and its surroundings. The fish appears to be healthy and active, moving smoothly through the water. The tank seems to be well-maintained, with no visible algae or debris. The rocks and coral provide a natural habitat for the fish, and the overall ambiance of the tank is peaceful and calming.