The video shows a close-up of a fish's mouth as it bites down on a red worm. The fish's mouth is wide open, and its sharp teeth are visible as it clamps down on the worm. The worm appears to be wriggling, trying to escape the fish's grasp. The fish's skin is dark, and its eye is visible as it looks directly at the camera. The background is blurred, but it appears to be an underwater environment.