Worried about the effect on the river population by the avaricious cormorants and to a lesser extent the common tern. 
Then worry no more, the picture attached has been computer enhanced to highlight the number of fish in just one small section of the river.
It was taken to show just one area of the river Aire, say 6ft by 4ft below the Caroline bridge in calm river water when the sunlight produced a picture of a huge shoal of minnow size fish slowly moving with the light current.
Plenty of free luncheons for the cormorants.