The government won't look into what caused thousands of shellfish off the coasts of the North East and North Yorkshire.
Numerous marine animals, including crabs, have been washing ashore between Hartlepool and Whitby since late 2021.
The Environment, Food, and Rural Affairs Select Committee wrote to Therese Coffey, the secretary of the environment, requesting an immediate investigation into the mass die-off.
Finding the cause, however, was "highly unlikely," Ms. Coffey retorted.
According to a previous report by an expert panel, "a novel pathogen was the most likely" cause of the deaths.
The select committee's chairman, Scarborough and Whitby Conservative MP Sir Robert Goodwill, called for a fresh investigation to offer "as definitive an explanation as possible" and for numerous government agencies to monitor the region and conduct "thorough sampling and testing for chemical pollutants such as pyridine.".
However, Ms. Coffey reaffirmed the findings of the expert panel and stated: "Given the breadth of the analytical work already done, and further advice, I have decided that it is highly unlikely that we will find the cause.
"The government won't conduct any additional analysis.
The environment secretary claimed that "protocols for sampling and testing - both routine and for emergencies" were already in place.
According to her, the Environment Agency was the "first responder," and she requested that the Centre for Environment, Fisheries and Aquaculture Science (Cefas) be "engaged promptly" if a repeat of the incident occurred.
However, Ms. Coffey argued that there was "no question of the government providing any compensation or specific support" because the seafood industry already had access to a variety of resources.
She also dismissed worries about the economic effects of the die-offs, noting that stock monitoring suggested the catch in late 2021 was "broadly" normal and that no "significant reduction in landings" had been observed.
According to her, "This does not rule out the possibility that some extremely localized fishing grounds suffered significant mortalities.".
She added that lobster landings in the 2022 season were "in line with seasonal expectations" based on stock monitoring.
