Jack Perks is the first man to film or photograph every one of the UK's 54 species of freshwater fish. In this episode, we go fish watching with him on the River Frome and meet a host of wild creature, learn how he found and filmed all these elusive animals and discover some of the stranger 'fisherman's tales' from his adventures.
Guide to small river fish: where to see and how to identify
The finned dwellers, lurkers and sprinters of our rivers and streams are as varied and fascinating as any wildlife on dry land – our guide on small river fish looks common species found in British rivers, where to see and how to identify.