The video shows a large aquarium filled with numerous small fish. The fish are predominantly yellow with some orange and white ones. They are swimming around the tank, which has a greenish-blue background. A human hand is seen reaching into the tank, touching and moving the fish around. The fish seem to be enjoying the interaction, as they swim around the hand and even nibble at the person's finger. The aquarium appears to be well-maintained, with clear water and no visible algae or debris.