The video shows a person's hand moving around inside an aquarium. The aquarium is filled with various types of coral, including blue and green coral, and other sea creatures. The person's hand is seen touching and moving the coral around, possibly cleaning or arranging it. The lighting in the aquarium is dim, with a blue and purple hue, which adds to the underwater ambiance. The coral appears to be healthy and well-maintained, with no visible signs of damage or disease. The person's hand moves with care, suggesting that they are knowledgeable about handling marine life. Overall, the video provides a glimpse into the maintenance and care of an aquarium, highlighting the beauty and complexity of marine ecosystems.