The video shows a close-up of a crab in a body of water. The crab is moving its legs and claws, and its body is partially submerged in the water. The crab's shell is a dark color, and its legs and claws are a lighter color. The water is murky, and there are small particles floating around. The crab appears to be alone in the water, and there is no visible food or other creatures in the vicinity. The crab's movements are slow and deliberate, and it seems to be exploring its surroundings.