The video shows a large lizard swimming in a tank of water. The lizard has a long tail and is moving slowly through the water. There are several small fish swimming around the lizard. The tank appears to be indoors, and there is a reflection of a person visible in the glass. The water is clear, and the lizard's scales are visible. The fish are orange and white, and they are swimming in different directions. The lizard's movements are slow and deliberate, and it seems to be enjoying the water.