My first sighting ever

Of a wild otter on our local river. There were two of them putting on quite a display. I spotted the first one from afar and we had quite a gathering of interested onlookers for about half an hour. They are very quick, in the water, catch a fish (grey mullet, I think), head out of the water and quick as a flash back down again. The extra is a bit blurred but I thought worth including. I thought they were nocturnal, what were they doing in broad daylight? I am quite tired now, after my lack of sleep last night so I am going to put my feet up and watch last night's Strictly.