Biofouling, jellyfish, plankton and water quality read as operational signals — interpreted early enough to act on.
The real challenge is knowing which signals matter, what they mean for the fish, and what should happen next.
Chronic exposure to biological risk affects gill health, appetite, behaviour, oxygen availability and feed conversion. These are invisible financial leaks — costs that never appear as a single emergency, but accumulate quietly through reduced biological and operational performance.
Gill-damage risk against cnidarian coverage scale on nets. Above site-specific cautionary coverage, coverage alone stops being enough - hydroid maturity assessment decides whether cleaning helps or harms.
Modern aquaculture produces enormous amounts of information: satellite observation, water quality, nutrients, temperature and oxygen profiles, fouling surveys, algae, jellyfish and micro-jellyfish counts, fish behaviour, gill health. Individually, none of these tells the whole story. The work is connecting them.
Satellite earth observation gives a view past the site itself — environmental change and biological conditions approaching from outside.
In-situ measurement resolves what is actually happening around the pens: oxygen, temperature, salinity, nutrients, algae, jellyfish and micro-jellyfish.
Fouling type, coverage and maturity down the water column — assessed on foot at the surface and on camera at depth.
Behaviour, appetite and gill condition are the reality check: are environmental conditions translating into biological impact?
A structured methodology for turning environmental and biological information into operational decisions. It runs as a cycle, not a report.
Bring environmental, biological and operational signals together to establish the current risk state.
Translate the assessment into risk categories and operational thresholds — stable, deteriorating, actionable — with clear criteria for net cleaning, feeding adjustments and life-support intervention.
Act inside the right biological and operational window. The objective is not simply to respond; it is to intervene at the right time.
Measure what happened. Compare outcomes against historical performance — mortality, FCR, operational cost — and use the result to improve the next decision.
Blind cleaning during mature cnidarian hydroid phases releases a cloud of stinging cells and microscopic fresh budded jellyfish into the pen and drives acute gill distress. The condition of the surrounding water, the presence of harmful algae, jellyfish and microscopic jellyfish, the type of fouling, the condition of the fish and the consequences of cleaning all belong in the same decision.
Does cleaning this net now deliver a real benefit for fish health?
No gonads, or immature ones. Medusae are not ready for release. Schedule the wash and use the window.
Maturing and already mature gonads with formed medusae. Washing now seeds the pen with stinging cells and fresh budded microscopic jellyfish at the exact moment the fish can least afford it.
Identify and interpret the biological risks actually affecting your operation, site by site.
Understand fouling dynamics and improve the timing and strategy of net-cleaning operations.
Site-specific programmes for harmful plankton, jellyfish and siphonophores, and what they mean for fish health.
Connect water-quality and environmental data to biological events and to the decisions they should drive.
Practical risk thresholds, decision matrices and defined operational responses your crews can run themselves.
Measure outcomes after the event and feed operational results back into the next decision.
It is shaped by environmental conditions, by the biological communities present and by site-specific dynamics. Understanding those relationships is what improves the timing and quality of an operational decision.
My 2025 biofouling study examined two Atlantic salmon farms in British Columbia, investigating biofouling communities alongside temperature, salinity, dissolved oxygen, pH and nutrients including ammonia, nitrate, phosphate, silica and iron. Read the paper.
The biofouling monitoring and assessment handbooks designed for area-specific biological risks and the operational decision flow chart turns both into a wash-or-wait answer.
I am a senior biologist with a PhD in ichthyology and approximately twelve years of experience across water quality, environmental management, regulatory affairs, and aquaculture operations.
Throughout my work in the water quality and environmental monitoring field, I have worked extensively with harmful plankton and jellyfish identification, biofouling assessment, life-support systems, and the operational challenges farms face during biological events.
My expertise is focused on the practical application of science: turning environmental and biological information into actionable insight that supports better decisions, strengthens farm management, and improves outcomes.
Every farm has its own biological environment and its own risk profile, and the most useful answer is rarely a generic one. If you are dealing with biofouling, jellyfish, harmful plankton, water-quality problems, gill-health concerns or uncertainty around an operational call, describe the problem and we'll work from there.
Better biological intelligence starts with better questions.