In the video, a red crayfish is seen in a tank. The crayfish is moving around the tank, and it appears to be looking for food. The tank is filled with water, and there are some rocks and plants visible in the background. The crayfish has long antennae and is mostly red in color, with some white spots on its body. The tank seems to be well-maintained, and the water is clear. The crayfish moves around the tank, exploring its surroundings.