The prolonged low levels and cold water this spring are ideal conditions for certain salmonid diseases to proliferate in rivers, especially fungal infections.

There have been reports from the Severn in the past week of fish in distress. With no change in the forecast for the next week or two, we may start to see this in the Wye and Usk too.

The Environment Agency has issued advice to anglers and other river users on what to do if you witness fish in distress or behaving unnaturally. Examples of this could be fish lying in the shallows and not moving when approached or showing the visible signs of infection (usually white patches on their skin).

The Agency are also trying to understand more about a new disease in salmon called "Red Skin Disease", the cause of which is unknown. They have also issued advice on what to do should you catch a salmon with the symptoms.

EA - What to do if you come across a distressed fish

Red Skin Disease