In the video, a man is seen using a net to transfer fish from a large tank to a smaller tank. He carefully scoops up the fish with the net and places them into the smaller tank. The man appears to be an experienced fish keeper, as he handles the fish with care and precision. The large tank is filled with clear water and has several plants and decorations, while the smaller tank is also filled with water and has a few plants. The man's movements are smooth and deliberate, indicating that he is familiar with the process of transferring fish. Overall, the video showcases the man's expertise in handling fish and maintaining their environment.