Don’t Break the Biofilm. Open It.

• Biofilms are structured communities of bacteria embedded in a protective, slimy matrix.

• They're nature's most successful survival strategy—making bacteria up to 1,000 times more resistant to antibiotics and disinfectants than their free-floating counterparts.

The Hidden Threat Right Under Our Eyes

• Biofilms are everywhere: coating ship hulls beneath the waves, forming inside medical catheters, clogging industrial pipes, and even creating the plaque on your teeth. What appears as a simple "slimy layer" is actually a sophisticated bacterial city with organised neighbourhoods, communication networks, and defence systems.

How Biofilms Form and Persist

• Bacteria don't just randomly cling to surfaces—they go through a complex multi-step process:

• Attachment: Individual bacteria land on a surface and start to adhere.

• Colonisation: Bacteria multiply and begin producing the protective matrix called EPS.

• Maturation: Complex 3D structures form, featuring channels for nutrient flow.

• Dispersal: Some bacteria detach to colonise new surfaces or depart due to low nutrients.

• The protective matrix—made of proteins, DNA, lipids, polysaccharides, metals, and water—acts like a fortress wall, preventing antibiotics and immune cells from reaching the bacteria inside. This is why biofilm infections are so persistent and difficult to treat.

• In healthcare, biofilms underlie up to 90% of chronic wounds, colonise catheters and implants, and make infections extremely hard to treat

• In industry, they clog pipes, coat water systems, and foul aquaculture gear.

• At sea — they grow on ship hulls, increasing drag, fuel use, and carbon emissions.

• Current solutions are limited.

• We were intrigued by how some marine surfaces remain remarkably clean despite constant microbial exposure. This led us to investigate how certain marine life resists fouling — and what we found surprised us.

• Within their shells and exoskeletons, we identified a family of bioactive molecules that don’t just inhibit biofilms - they send a signal that causes the biofilm’s protective layer to open, triggering dispersal. This release unanchors the bacterial community, leaving them exposed and vulnerable.

• In our closed lab model, we’ve seen bacteria rapidly depart from their home on the leaves of sea lettuce (Ulva spp.) and move toward the surface - reforming a cohesive biofilm structure at the meniscus of the seawater in the container. This entire cycle appears to be triggered by the molecular signal we identified in the seafood waste.

• Could this biologically timed signal be the key to safer, smarter biofilm control across medicine, marine industries, and environmental systems?

• In healthcare, this approach could transform how we treat chronic wounds - triggering the biofilm’s protective layer to open, releasing the bacteria it shelters and making them vulnerable to antibiotics and the immune response.

• In industry and marine environments, it tackles existing biofilm contamination. Our biologically inspired signal persuades established biofilms to release their grip from critical infrastructure, such as water pipes, aquaculture systems, and processing equipment.

• And because these compounds are upcycled from seafood waste, this strategy transforms discarded material into a high-impact tool - aligning biofilm control with circular economy principles.

Dr David Stapleton

Biomedical scientist with over 25 years at the University of Melbourne, 100+ scientific publications, and a strong record of innovation - later transitioned from academia into entrepreneurial ventures.

Rob Gell AM

A leading sustainability entrepreneur and President of the Royal Society of Victoria. By background, Rob is a geographer and coastal geomorphologist with expertise in marine environments.

Wani Wall

Wani Wall is a strategic consultant helping medtech and sustainability startups define their brand and navigate complex regulatory landscapes. She blends creative strategy with deep operational and commercial expertise.