HUNDREDS of dead fish were found in a marina near Abergavenny today.
The Environment Agency said the fish, mostly bream, carp and roach, were found on the on the Monmouthshire and Brecon Canal at Goytre Wharf.
A possible reason is a 30cm drop in the water level at the marina caused by work upstream, but the cold weather, ice and a lack of oxygen are more likely to have killed the fish.
Smaller fish were found alive in the marina and initial tests showed there was no pollution.
Environment Agency officers are continuing their investigations and advising people not to remove or go near any fish.