Aquaculture diving means cleaning, inspecting and repairing the underwater nets, cages and moorings of fish farms, and retrieving dead fish (“mortalities”) — inshore, generally shallow work that keeps commercial divers busy year-round rather than seasonally. It is one of the largest single sources of day-to-day diving work in the industry, concentrated around the salmon-farming sectors of Norway, Scotland and Chile. It is also, by the industry’s own safety data, some of the riskier diving work going, which is exactly why regulators treat it as diving work requiring a recognised qualification rather than an informal add-on.
What aquaculture divers actually do
Day-to-day tasks centre on the pens: cleaning nets (biofouling reduces water flow and fish health), inspecting nets and cages for damage or holes, retrieving dead fish before they decompose, checking and maintaining mooring lines and anchors, and general underwater monitoring of the site. Most of this work happens at modest depths — commonly cited in the low tens of metres, roughly 18–30 metres depending on the site — using surface-supplied or SCUBA equipment rather than saturation diving.
Why it is such a significant slice of the industry
Salmon farming runs on a scale that keeps divers busy essentially all year: Norway is the largest producer, with Scotland and Chile as the other major hubs. Because pens need regular net cleaning and inspection regardless of season, aquaculture work offers something inshore construction diving often cannot — steady, year-round demand. Industry sources describing similar aquaculture-diving programmes note this segment can produce a genuinely high number of logged dives per year (a commonly cited, if indicative, figure is up to several hundred), which makes it one of the faster ways for a newly qualified diver to build the logged experience that later opens better-paid or more specialised work — see our guide on how to become a commercial diver in Europe for how that early-career step fits the broader route.
The safety picture, honestly
Aquaculture diving carries real, documented risk, and it is worth being straightforward about that rather than glossing over it. In Chile, the Association of Professional Divers has recorded 245 diving accidents at salmon farms between 2004 and 2022, of which 44 were fatal — figures reported by Chilean industry and safety press and cited in academic coverage of occupational health in Chilean aquaculture. Fatal incidents have also been reported at Norwegian and Scottish sites. The specific hazards are well understood: net entanglement, hydrogen sulphide (H₂S) building up from decomposing biomass during mortality events, cold water, poor visibility, and repeated “yo-yo” dive profiles (many short dives in and out of the pens) that raise the risk of decompression sickness if not managed properly. That risk profile is precisely why a recognised diving qualification — not informal experience alone — is what regulators require before someone dives a fish farm professionally.
What certification you actually need, country by country
In Norway, aquaculture diving falls under the same national diving regulations as other professional diving: a B-bevis (issued by Arbeidstilsynet) or a Class 1/Class 2 certificate (issued by Havindustritilsynet) depending on the scope and depth of the work — there is no separate, lighter “aquaculture-only” certificate. In the United Kingdom, fish-farm diving in UK waters falls under the HSE’s Diving at Work Regulations 1997 as inland/inshore diving, requiring a qualification from HSE’s approved list appropriate to the method (SCUBA or surface-supplied) and depth of the site. For comparison, Australia runs a dedicated pathway — the ADAS Aquaculture SSBA to 30m course — built specifically for this kind of work; Europe generally does not have an equivalent stand-alone “aquaculture diver” ticket, so the underlying commercial-diving qualification is what carries you into the role. Chile regulates commercial diving separately again, through DIRECTEMAR’s own buzo profesional registration system, which applies its own national requirements distinct from the European and Australian schemes above — check current rules locally before assuming any foreign qualification transfers.
How a Dutch training route leads into this work
There is no BC-opleidingen course specifically branded “aquaculture diver” — and we are not going to pretend there is. What the Dutch route offers is the underlying qualification the work actually requires: training through scope levels from A9 up to B30/B50 (SCUBA through surface-supplied diving), registered with NDC-RI. A B30 (surface-supplied to 30 metres) sits squarely in the depth range most aquaculture-diving work happens at. As with other inshore/civil work, aquaculture diving is a realistic way for a newly qualified diver to start logging paid hours close to home before moving toward offshore or more specialised work — see our guide to becoming a professional diver for how the scope-level system (A9 through B50) works in practice.
Finding the work
Aquaculture-diving jobs are typically advertised by specialist marine-services contractors that serve the salmon-farming industry in Norway, Scotland and Chile, rather than by the fish farms themselves — most fish-farming companies outsource net cleaning, inspection and mortality removal to dedicated diving contractors. What those contractors ask for is a recognised surface-supplied or SCUBA commercial-diving qualification valid for the site’s depth and location — check individual job postings for the exact certificate they require, since requirements (and which national scheme they accept) vary by country and by contractor.
Frequently asked
What does an aquaculture diver actually do?
Cleaning and inspecting fish-farm nets and cages, retrieving dead fish, and checking mooring systems — mostly inshore, shallow work (roughly 18–30 metres) using SCUBA or surface-supplied equipment rather than saturation diving.
Is aquaculture diving dangerous?
It carries real, documented risk. In Chile, the Association of Professional Divers recorded 245 diving accidents at salmon farms between 2004 and 2022, 44 of them fatal. Hazards include net entanglement, hydrogen sulphide from decomposing biomass, cold water and repeated dive profiles that raise decompression-sickness risk if not properly managed — which is exactly why a recognised qualification, not informal experience, is required.
Do I need a special “aquaculture diver” certificate?
Generally no, outside Australia (which runs a dedicated ADAS Aquaculture SSBA to 30m pathway). In Norway, the UK and most of Europe, aquaculture diving falls under the same national commercial-diving regulations as other inshore work — you need the standard qualification appropriate to the method and depth, not a separate aquaculture-specific ticket.
Can a Dutch commercial-diving qualification lead to aquaculture-diving work?
Yes, in principle — a B30 (surface-supplied to 30 metres) qualification through the Dutch scheme sits at the depth range most aquaculture-diving work happens at. There is no aquaculture-specific course; it is the underlying commercial-diving qualification, plus meeting whichever country’s and contractor’s specific requirements, that opens the door.
Why is aquaculture diving a good way to start a commercial-diving career?
It runs year-round rather than seasonally and can produce a high number of logged dives per year, which builds experience quickly. Many newly qualified divers use inshore work like this — alongside harbour and construction diving — to log hours before moving toward offshore or more specialised roles.
Can a European diver work on Chilean salmon farms?
Not automatically. Chile regulates commercial diving through its own DIRECTEMAR registration system (matrícula de buzo profesional), separate from European and Australian schemes. Check the current requirements with DIRECTEMAR or a local employer before assuming any foreign qualification transfers.