The upper part of the River Lea is beautifully clear. You can see right down into the underwater grasses.
And you can see loads of fish! A friend told me there are perch in the river so I looked them up and see that they are the stripy ones I catch sight of sometimes, but I wonder if the others might be gudgeon? These are little fishlets but the bigger ones were a browny/grey colour, silvery underneath.
They were darting around together but I noticed every so often, one would swim on the spot, head downwards, tail up to the surface. Then another would join it and maybe one or two others so you had a little group that looked like synchronised swimmers. Does anyone know why they do this?