The video shows a group of mussels attached to a rock. The mussels are yellow and brown in color, and they are surrounded by seaweed and other marine plants. The water is clear, and the mussels are moving slightly with the current. The rock is covered in algae and other marine life, creating a vibrant underwater scene. The mussels are of various sizes, and some are partially open, revealing their inner shells. The video provides a close-up view of the mussels and their environment, highlighting the intricate details of the marine ecosystem.