The video shows a scuba diver in a black wetsuit with yellow gloves, using a yellow spear to catch a lionfish. The diver is seen approaching the lionfish, which is camouflaged against the coral reef. The lionfish has distinctive red, white, and black stripes and long, venomous spines. The diver carefully aims the spear and successfully catches the lionfish, which is then held up for the camera. The underwater environment is clear, and the coral reef is visible in the background.