Highlvl Underwater Robots in Aquaculture
Overview
Aquaculture net pen inspection solutions: Aquaculture supplies a large share of the world’s protein and China is the world’s largest producer. Traditional farming has long relied on human judgement, with too little insight into the underwater environment, stock condition and facility safety. Net damage, declining water quality, low bottom oxygen and disease outbreaks are often detected late, causing heavy losses. Diver inspection is slow, costly and risky, and cannot meet the fine-grained management that large-scale, intensive farms need.
As the underwater farm steward, the ROV enters the farming water to survey the environment, inspect structures, observe stock and assess the seabed, turning the underwater farm from a black box into a transparent operation and moving aquaculture from experience and luck to data-driven precision farming.
Core application scenarios
1. Structural safety inspection of farm cages
Cage frames, nets and mooring systems are the physical barrier of the farm and endure waves, current, typhoons and biofouling, so frames corrode and break, nets tear and mooring ropes loosen and wear. The ROV sweeps systematically along the cage bottom and sides, using HD cameras to find holes, broken netting and frame deformation, and checks mooring connections and rope wear, catching problems before typhoon and harvest seasons to prevent escapes and facility loss.
2. Observing stock condition underwater
Feeding behaviour, swimming and skin condition directly reflect growth quality and disease risk. The ROV hovers inside the cage to observe fish closely without disturbing the shoal, recording density, feeding activity, parasites, lesions or abnormal pigmentation; with AI image recognition it estimates numbers and length distribution, giving direct input for feeding strategy and early disease warning.
3. Monitoring the farming water environment
Dissolved oxygen, temperature, salinity, turbidity and pH determine survival and growth. With multi-parameter water quality sensors the ROV profiles different layers and locations in the cage, drawing three-dimensional water quality maps that reveal local hypoxic zones, thermoclines and pollutant accumulation, and tracks trends against historical data to inform aerator operation, water exchange and feeding adjustments.
4. Sediment and seabed assessment
Uneaten feed and faeces accumulating in ponds, RAS tanks and around cages degrade the bottom, release hydrogen sulphide and breed pathogens. The ROV films and samples sediment on the pond floor or below the cage to assess colour, thickness, organic content and black-odour severity, verifies dredging results and guides sediment improvement and production-cycle planning, reducing the risk of sediment-related disease.
5. Evaluating feed performance
Precise feeding is central to cutting feed cost and pollution. The ROV dives during and after feeding to record how pellets sink and disperse and how the fish respond, identifying feed wasted on the bottom or uneven feeding, and combines this with feeding data to refine timing and quantity, improving feed conversion and reducing the nutrient load on the water.
6. Support for stocking and grading
Stocking fry and grading market-size fish are critical steps that traditionally rely on divers or lifting nets, which is slow and can injure fish. The ROV monitors fry distribution and acclimation during stocking and observes net position, fish aggregation and grading results, reducing mechanical damage and stress and improving survival and grading efficiency.
7. Operating offshore aquaculture platforms
Large offshore farming vessels, gravity cages and truss cages operate in deep water with complex structures and demanding maintenance. The ROV periodically inspects the underwater structure, mooring system and submerged passages, assessing corrosion, weld cracks and biofouling, and performs rapid post-storm inspections to keep offshore farms running safely.
Technical advantages
| Capability | Technical feature | Farming value |
|---|---|---|
| Non-invasive observation | Low-noise, low-disturbance design that does not alarm the fish | Captures genuine behaviour and condition data |
| Fine HD imaging | 4K camera with underwater lighting and image enhancement | Clearly reveals skin lesions, parasites, net holes and other detail |
| Multi-parameter integration | Fuses water quality, current, temperature, dissolved oxygen and other sensors | One vehicle surveys the environment and collects the data |
| Precise control | Hovers in current, flies along the net and cruises at a fixed depth | Works flexibly in tight cage spaces and complex flow |
| AI recognition | Fish counting, length estimation, behaviour analysis and disease warning | Upgrades human judgement to data-driven decisions |
| Long endurance | Supports several hours of continuous operation | Covers full inspection of large farms |
| Traceable data | Full recording, coordinate annotation and automatic reporting | Builds farm records that support insurance claims and quality traceability |
| Lower labour cost | Replaces diver checks and rule-of-thumb judgement | Reduces safety risk and raises inspection frequency and coverage |
Typical aquaculture applications
- Marine cage farming: net damage patrols, frame corrosion checks, mooring safety assessment and stock observation
- Offshore farming platforms: underwater structure checks on large cages and farming vessels, mooring inspection and help with biofouling removal
- Pond farming: pond sediment assessment, stratified water quality monitoring, aeration effectiveness checks and sediment improvement acceptance
- Recirculating aquaculture systems: in-tank inspection, pipe blockage identification and biofilm assessment
- Marine ranching: artificial reef monitoring, stock enhancement assessment and seabed seeding area surveys
- Hatchery and nursery: fry stocking monitoring, nursery tank patrols and substrate condition checks
- Harvest support: net position confirmation, fish aggregation observation and harvest monitoring
How we support you
For aquaculture companies, marine ranching operators, fisheries cooperatives and aquaculture technology providers we provide:
- Equipment customization: ROV platforms and sensor configurations tailored to the farming method (cage, pond, RAS or offshore)
- Inspection services: underwater inspection of farm facilities, environmental assessment and digital reporting
- Smart upgrades: AI image recognition and water quality analytics integrated into a smart farming sensing system
- Technical training: dedicated training in ROV operation, underwater farm inspection standards and data analysis
- O&M support: periodic inspection plans, facility health records and farming environment databases
- Emergency support: rapid underwater inspection and loss assessment after typhoons or disease outbreaks