The video shows a group of hermit crabs in a tank. The crabs are seen moving around on the sandy bottom of the tank. The tank appears to be well-maintained, with clear water and no visible debris. The hermit crabs vary in size and color, with some having darker shells and others lighter. The crabs are seen interacting with each other and their environment, with some crabs moving towards the camera and others away. The tank appears to be a controlled environment, possibly in a pet store or a home.