The video shows a group of fish swimming in an aquarium. The fish are of various sizes and colors, including shades of gray, black, and brown. They are swimming around a large piece of driftwood that is placed in the center of the tank. The fish are moving in different directions, some swimming near the driftwood while others are swimming in the open water. The aquarium appears to be well-maintained, with clear water and a sandy bottom. The lighting in the aquarium is bright, highlighting the colors of the fish and the driftwood.