The video shows a group of mussels in a body of water. The mussels are black and white in color and are attached to rocks and other objects in the water. The camera moves around the mussels, giving a close-up view of their shells and the surrounding environment. The water is clear, and the lighting is natural, suggesting that the video was taken during the day. The mussels appear to be healthy and are moving slightly with the water's current.