The video shows a fish swimming in an aquarium. The fish is yellow and has a long tail. It swims around the tank, passing by rocks and coral. The water is clear and the lighting is bright, highlighting the fish's movements. The fish appears to be healthy and active, moving smoothly through the water. The aquarium is well-maintained, with no visible debris or algae. The fish's fins are in good condition, and it appears to be of a medium size. The aquarium is decorated with rocks and coral, providing a natural habitat for the fish.