The video shows a scuba diver in the ocean, holding a spear and a net. The diver is attempting to catch a lionfish, which is a venomous fish known for its distinctive appearance. The lionfish has long, venomous spines and is known to be a threat to coral reefs. The diver is wearing scuba gear and appears to be experienced in handling the equipment. The water is clear, and the ocean floor is visible in the background. The lionfish is seen swimming around, trying to avoid the spear and net. The diver successfully catches the lionfish and holds it up for the camera. The video provides a close-up view of the lionfish's spines and the diver's equipment.