Scottish Natural Heritage have released a statement to ITV Border describing the risk of crayfish transfer to silage bales as "very small."
"It is the first time that we have come across reports of signal crayfish being transported in silage bales.
"Although it's feasible that crayfish might get caught up in the bales the risks of transfer of live crayfish between river catchments is very small."
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'The Marble Run' is aimed at getting people thinking positively about rivers in Cumbria, following last winter's floods.
Two men, aged 19 and 25, have been charged with sexually harassing two women in Jedburgh on Saturday night.
The A66 at Bassenthwaite will be closed overnight for the next six weeks to allow for flood resilience work to take place.