Death of 1,000 crayfish in Blue Mountains under investigation by EPA

Up to 1,000 dead or dying crayfish were discovered in the Blue Mountains town of Hazelbrook and the EPA is leading the investigation to identify the pollutant. Photograph: BMCC

The deaths of about 1,000 giant spiny crayfish are being investigated by the Environment Protection Authority in a likely pollution incident in the Blue Mountains this week.

Hundreds of dead crayfish were found in a tributary of Hazelbrook Creek, near Horseshoe Falls, on Wednesday by a tour guide.