When a Toasted Caiman sees an Electric Eel it will hide on the bottom of the river where its black body provides some camouflage. The caiman will track the eel until the eel swims into shallower water. Then the caiman will pounce on the eel, making sure that its own tail is touching the bed of the river. More often than not, the eel heads to the surface, causing the Toasted Caiman to lose contact with the river bed and thus receive a hefty jolt of electricity. The Caiman is strong enough to withstand the shock, but often receives burns to its jaw. In such situations, the caiman will swim to the bank and eat fruit for a week before heading back into the water to renew its rivalry with the Electric Eel.

This is an extract from the book Animals Evolution Avoided