Intrepid angler Jeremy Wade searches for the elusive Amazon bull shark to see what the ferocious predator can reveal about the health of the river.

Jeremy travels the length of Kenya, visiting two gigantic lakes in search of the giant Nile perch – one of the biggest freshwater fish in the world.

Jeremy Wade's fishing adventure through Iceland's river systems in search of the elusive Atlantic salmon, a fish that even he has never caught before.