The video shows a large fish in an aquarium. The fish is a Sorubim catfish, characterized by a grey body, a white underside, and long white barbels protruding from its face. It has a prominent dorsal fin and a distinct white stripe along its side. The fish is swimming slowly in the tank, its body facing upward slightly. The bottom of the aquarium is covered with small, light-colored gravel. The background includes a dark, rock-like structure and reflections of people on the glass of the tank. The lighting inside the tank is bright, highlighting the fish and its surroundings.