The Kilombero Valley in South Western Tanzania is the destination in this episode as the Wildfly team explore the Rufigi River system looking for a very special target species, the Blue Tigerfish. The Blue Tigerfish really is a true freshwater monster growing up to 20lbs, almost 10lbs more than its South African cousins, and sporting a distinctive blue adipose fin. Gareth and Jeremy head into one of the River Kilombero's tributaries and their guide puts them on the spot immediately as Gareth hooks into a large powerful fish on his very first cast. On day two they move out of the main current of the river to a newly formed ox bow lake where the water is much calmer...well except for the aggressive tigers here which are smashing baitfish left right and centre. Using poppers, Jeremy soon attracts the attention of a tiger who smashes his fly on the surface before another thrilling fight ensues. Moving up river to some rapids, they decide to switch tactics and use fast sinking lines in a deep hole and Jeremy soon hooks into something very special, but is it the 20lb Blue Tigerfish from Tanazania he's been searching for?
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