“No, a perch.”
The angler has just unhooked a small fish and returned it to the canal. I think of perch as being deep and narrow but it takes a while for the adult to develop that impressive hump and belly.
The towpath is regularly mowed so instead of going to seed the plants along the water’s edge are still sprouting fresh flowers: tansy, greater willowherb, leafy hawkweed, red clover, yarrow and autumn dandelion. Elderberries are now ripe and we’re well into the blackberry season.