The video depicts a large, purple eel swimming in a tank. The eel is seen moving around the tank, with its body undulating in a smooth, fluid motion. The tank appears to be a controlled environment, possibly an aquarium, with a variety of green plants and rocks providing a naturalistic habitat for the eel. The eel's skin has a shiny texture, reflecting the light in the tank, and its movements are graceful and effortless. The tank seems to be well-maintained, with clear water and no visible debris. The eel's size is impressive, indicating that it is likely an adult. Overall, the video provides a captivating glimpse into the life of this fascinating creature.