Spey Fishery Board has blamed a fly-tipping incident in a nearby lay-by.
The Greenland shark, which can have a lifespan of over 500 years, was discovered in Sligo on Saturday.
The JSPCA says a trio of goldfish would not have survived after they were abandoned in a pond.
The UN assessment of the state of migratory freshwater fish revealed an 81% decline in the last 50 years.
Steve Barclay asks why there has been no prosecution after about 900 fish died in Whittlesey.
Fish washed into a field after a hole opened up in the Llangollen Canal in Whitchurch in December.
The project to fix a canal breach in Shropshire is proving expensive, a charity reveals.
A rescue team are to temporarily stun the 1,000 native fish with a low-voltage electric current.
Winchester's MP highlights sewage spills potentially affecting the endangered Atlantic salmon.
