The video shows a crab in a tank of water. The crab is seen moving around the tank, and at one point, it opens its claws. The water in the tank is clear, and the crab is the only visible creature in the video. The crab's movements are slow and deliberate, and it appears to be exploring its surroundings. The tank seems to be indoors, as there are no visible windows or natural light sources. The crab's shell is a mix of green and brown colors, and its claws are a bright red color.