FiFish V6
An industrial ROV shrunk to laptop money: your eyes 100 meters underwater, joined to you by a cable.
Why this verdict · Updated July 2026
TELEOPERATED, and in this category that is praise, not an accusation. Underwater, physics forbids radio, so every ROV carries a human pilot by definition: nobody fakes autonomy and there is no demo to debunk. What we verify is something else: that the product exists, has been on sale since 2019, and does what it advertises in the hands of thousands of buyers, from anglers to hull-inspection crews. The V6 is honest by architecture: it is you swimming, with your eyes at 100 meters and your body dry on the boat.
What it does well
- An industrial ROV's architecture at laptop money
- Truly omnidirectional: six thrusters, 360° rotation on any axis
- Immersive piloting with VR goggles that track your head movement
- No autonomy to fake: the cable tells the truth by design
What it doesn’t
- The cable is limited freedom: a 100-meter radius, and mind the propellers and rocks
- Without a pilot it does nothing: zero autonomy, by physics and by design
- In murky water the 4K camera sees what's there: not much
- Accessories (arm, sonar, long tether) inflate the bill quickly
Specifications
| Maker | QYSEA Technology (Shenzhen, 2016) |
|---|---|
| Price | V6 from ~$1,600 · V6 Expert (robotic arm) $2,999 |
| Maximum depth | 100 m, on an umbilical cable |
| Movement | 6 thrusters, omnidirectional (world's first with 4K) |
| Camera | 4K at 30 fps with built-in LED lights |
| Battery | ~4 h per dive |
| Launch | 2019 (Good Design Award 2019) |
The underwater industry, shrunk
An industrial work-class ROV costs hundreds of thousands of euros and needs a ship with a crane. QYSEA, founded in Shenzhen in 2016, compressed that architecture (umbilical cable, thrusters, camera, lights) into a carry-on case and laptop money. The FiFish V6, unveiled in 2019, was the world's first omnidirectional ROV with a 4K camera: six thrusters give it the full-axis rotations aerial drones cannot afford, and VR goggles turn piloting into something like swimming without getting wet. That year's Good Design Award certified the obvious: it didn't look like an industrial product because it no longer was one.
Its buyers draw the map of uses: anglers scouting shoals, boat owners inspecting hulls and propellers without paying a diver, fish farmers checking cages, and the curious who simply want to see what's down there. It is the same question that drives the ocean's big robots, at hobby scale.
The cable that tells the truth
On land, knowing who really controls a robot takes detective work. Underwater it doesn't: radio doesn't penetrate, so the V6 carries its answer strapped to its back. The 100-meter cable tying it to the surface is at once its live video feed, its recovery insurance and its statement of honesty. Human pilot, always; the robot contributes only the auto-stabilization that holds the frame while you decide where to look.
That is why its verdict, TELEOPERATED, works here the way it works for OceanOneK, Stanford's haptic diver: as a description of merit. The Expert version adds a grasping robotic arm for $2,999, and the house rule for this whole category applies: buy for the mission (depth, cable, sensors), not for the maker's video.
Industries
Frequently asked
How much does the FiFish V6 cost?
The base V6 starts around $1,600 (roughly 1,500 to 1,700 euros depending on store and bundle, with a 100-meter cable and VR goggles in many packs). The V6 Expert, with a robotic arm and professional options, costs $2,999. Accessories like sonar or longer tethers cost extra.
Is the FiFish V6 autonomous or teleoperated?
100% teleoperated, like every ROV: a human pilot steers it from the surface through its cable, which also carries the live video. Radio doesn't work underwater, so in this category the cable is not a flaw: it is the only physical way for you to see and decide in real time.
What is an underwater drone like the FiFish V6 for?
The uses that pay for it: inspecting hulls, propellers and docks without hiring a diver; locating fish shoals and structure for fishing; checking aquaculture cages; filming 4K video of bottoms and wrecks above 100 meters. Looking for looking's sake works too, but the price makes sense when it replaces paid dives.