In the video, a person is seen placing a sea creature on the sandy bottom of a fish tank. The creature is small and has a purple hue. The person then places another creature on the sand, which is larger and has a greenish-purple color. The tank is filled with various types of coral and rocks, creating a natural underwater environment. The person's hand is visible as they carefully place the creatures on the sand. The video is shot in a close-up view, allowing for a detailed look at the creatures and the tank's environment.