EVIDENCE has been found for the first time that fibreglass is entering the food chain.

A new study has discovered “concerning” levels of fibreglass particles in oysters and mussels, raising fears over health and the environment.

Fibreglass or glass-reinforced plastic (GRP), which is used extensively in boat manufacturing, was thought to be durable but researchers have found it is breaking down and contaminating coastal waters, causing unexpected harm to marine life.

READ MORE: UK nations object to Ofcom's England-centric Channel 4 budget

Up to 11,220 fibreglass particles per kilogram were found in oysters and 2740 particles per kilogram were found in mussels in the study by the Universities of Brighton and Portsmouth.

“Our findings show a disturbing level of GRP contamination in marine life,” said Dr Corina Ciocan, principal lecturer in marine biology from the University of Brighton. “This study is the first of its kind to document such extensive contamination in natural bivalve populations. It’s a stark reminder of the hidden dangers in our environment.”

Fibreglass, widely used since the 1960s, is “incredibly” difficult to dispose of properly, often ending up abandoned or improperly discarded, according to the researchers. This results in tiny glass particles entering the water, especially during peak boat maintenance seasons like winter.

These particles then accumulate in bivalves such as oysters and mussels, which are crucial to marine ecosystems due to their filter-feeding habits.

Bivalves, being stationary filter feeders, are highly susceptible to accumulating these particles, which can severely impact their health as the ingestion of GRP can interfere with their digestive systems leading to physiological stress and even death.

READ MORE: Miriam Margolyes backs Scottish independence ahead of Fringe show

This not only affects marine life but could also have significant implications for human health, given that these bivalves often end up on our plates, the researchers say.

Professor Fay Couceiro, from the University of Portsmouth, said it was a global issue but of particular concern for island nations with limited landfill space.

“We’re just starting to understand the extent of fibreglass contamination,” she said.

The researchers are advocating for further research to understand the potential transfer up the food chain and the implications for human health.

They said their study highlighted the urgent need for better regulation and management of GRP disposal and is a wake-up call for the boating community and environmental regulators.

“We must improve public access to slipways and commercial boat maintenance facilities,” said Dr Ciocan. “Creating a better ethos around end-of-life boat management is crucial to minimise further exposure and spread of these contaminants.

Professor Couceiro added: “We have to address this issue head-on to protect our marine ecosystems and ensure a healthier future for our oceans.

“Efforts are being made to find viable disposal solutions, but more needs to be done to prevent at-sea dumping and onshore burning,” she said.