Prices are US list prices as of Oct 2026 from the sources linked.
Underwater drones are small remotely operated vehicles (ROVs) that swim instead of fly. They’re used to explore reefs and lakes, check boat hulls and docks, find fish, and inspect underwater structures. We haven’t used these ourselves; this guide is based on manufacturer specs and US retailer listings.
How they differ from aerial drones
| Aerial drone | Underwater drone (ROV) | |
|---|---|---|
| Control link | Wireless radio | Physical tether (radio doesn’t travel through water), often to a Wi-Fi buoy or spool |
| Positioning | GPS | No GPS underwater; depth sensor and compass |
| Movement | Rotors | Thrusters; better models move in any direction |
| Limits | Altitude, wind, airspace | Depth rating, tether length, water clarity, currents |
| FAA rules | Yes | No; they aren’t aircraft. Local boating, park and marine-sanctuary rules can apply |
Example models and prices (as of Oct 2026)
| Model | Depth rating | Video | Price |
|---|---|---|---|
| Chasing Dory | 15 m (49 ft) | 1080p | $559 list, $429 sale at B&H |
| QYSEA FIFISH V-EVO | 100 m (328 ft) | 4K/60 | $1,399 (Standard); $1,699 with robotic arm, QYSEA store |
| Chasing M2 S | 100 m (328 ft) | 4K | $4,199 list, $3,799 sale (Advanced Set) at B&H |
| Chasing M2 Pro | 150 m (490 ft) | 4K | $4,599 (Advanced Set) at B&H |
Sources: B&H underwater drones, QYSEA FIFISH V-EVO. Prices change frequently.
What to look for
- Depth rating and tether length: a 15 m tether is fine for docks and pools; reef walls and lakes need more.
- Lights: water absorbs light fast; strong LEDs matter below a few meters.
- Thruster layout: more thrusters mean finer control near structures.
- Accessories: grabber arms, sonar or fish-finder add-ons, extra batteries.
- Maintenance: rinse in fresh water after saltwater use.
Uses for beginners
- Exploring under docks and boats
- Scouting fishing spots (check state fishing rules; see drones for fishing)
- Filming marine life from a boat or shore
- Checking moorings and hulls
Water-resistant aerial drones
If you want an aircraft that can handle spray or land on water, that’s a different product. See waterproof drones.
