The video captures a large catfish swimming in a body of water. The catfish has a long, whisker-like barbel that extends from its mouth. The water is murky, with a greenish tint, and there are branches and debris floating around. The catfish moves slowly and gracefully, its body undulating with the current. The barbel is prominently displayed as the catfish opens its mouth, revealing its sharp teeth. The video provides a close-up view of the catfish, highlighting its size and features.