The usual soundtrack of Vegas is the incessant, looping beeps and chimes of slot machines, but at CES it’s often replaced by the high-pitched whine of drones in flight. Much of the enormous South Hall of the Las Vegas Convention Center here plays host to a flock of vendors of unmanned aerial vehicles.

Drones have become a big business, thanks to the Federal Aviation Administration’s move last year to open the skies to commercial use and the utility of drones for inspecting things like farms, solar panels, wind turbines and wireless-network towers. As CES was opening, news broke that the Chinese drone manufacturer DJI had bought a majority stake in the German camera manufacturer Hasselblad—the company that made the cameras American astronauts took to the moon.

The show floor offered further proof of the increasingly professional nature of the drone industry with UAVs like Yuneec’s H520, an industrial drone in a shade of orange often seen in road-work signs that can carry a range of sensors and will sell for $2,500. But if you have more frivolous and less practical uses in mind, CES won’t disappoint you either.

Selfie drones

The idea of the drone selfie may seem silly, but I think we can allow that the traditional family Christmas-card photo might look a little snazzier if it involved an aerial perspective. So of course vendors will ship drones optimized for this use case.

Zero Zero Robotics’ Hover Camera Passport, $599, packs a 13 megapixel camera, a battery good for about 10 minutes of flight time, and a software bundle that includes auto-follow capability into a compact assembly that folds up for easy carrying. Its rectangular enclosure safeguards its four rotors, while its .534-lb. weight keeps the drone below the FAA’s .55-lb threshold that requires owners to register their drones.

(That registration program turned a year old Dec. 21; by that anniversary, the FAA announced that it had received more than 616,000 registrations.)

The $399 Rova, another selfie drone, doesn’t fold up and, at .595 lbs., is subject to the FAA’s registration requirement. It includes a 12-megapixel camera and also offers about 10 minutes of flight time.

Sink and swim

The “A” in UAV can stand for “aquatic” just as easily as “aerial,” something I realized after discovering the PowerVision PowerRay. This underwater drone is aimed at gadgetry-minded fishing enthusiasts. You toss the drone overboard from your boat, with a cable tether providing communication, and use its 12-megapixel camera to look for fish.

An integrated light both lures and illuminates fish. PowerVision also plans to sell an optional sonar fish-finder that will attach to the PowerRay’s underside. Because swimming takes less effort than flying, the drone should be able to dive for up to four hours. But the PowerRay won’t be cheap. A representative estimated that the drone would start at $1,500 when it ships in the fall.