Carp fisheries across Cheshire, Manchester and Liverpool are being advised to prepare for the predicted hot summer to ensure their stocks stay fit and healthy.
The Environment Agency has sent letters to all fisheries in the area reminding clubs to manage their waters carefully.
Nicki Rushton, Fisheries Team Leader, said: "With the predicted hot summer and the effects this has on oxygen levels in the water we thought now was a good time to remind fishing clubs of the easy steps they can take to reduce the risk of carp deaths."
Key areas highlighted in the letter include over stocking and reducing unnecessary stress including handling and moving carp, keeping them out of the water for too long and holding them in keep nets, all of which can lead them more susceptible to parasites and disease.
Nicki continues: "If you find any dead or dying fish you must report it to the Environment Agency using our 24 hour free emergency number 0800 80 70 60."