The video shows a close-up of a sea anemone attached to a rock underwater. The anemone has long, slender tentacles that are a dark color, possibly brown or black. The tentacles are moving slightly, suggesting that the anemone is alive and possibly feeding. The rock on which the anemone is attached appears to be covered in algae or other marine growth, indicating that it is in a natural underwater environment. The water is clear, allowing for a detailed view of the anemone and its surroundings. There are no other visible creatures or objects in the frame, and the focus is solely on the anemone and its immediate surroundings.