The Black Caiman is the largest crocodilian, and is also one of the biggest members of the family Alligatoridae.

The Black Caiman can grow up to 5 metres to 6 metres in length.

Hatchlings eat fish, Invertebrates, Frogs, Insects and Crustaceans, while juveniles eat large fish such as, Perch, Piranhas and Catfish, which remain significant food for the rest of their lives, and adult Black Caimans eat Turtles, Snakes, Birds and Mammals, Sloths, Armadillos, Pacas, Monkeys, Capybaras, Agoutis, Coatis, Deer, Peccaries, Giant Otters, Anacondas, Tapirs, pigs, horses, cattle and dogs.

Here is a video showing pictures of a Black Caiman fighting an Anaconda.

Electric Eels are a species of Knifefish despite their name that lives in the Amazon and Orinoco River.

They are more closely related to Catfish than Eels.

It can generate up to 860 volts of electricity which it uses for hunting, self-defence and communicating with other Electric Eels.

Electric Eels can be 2 metres in length, and can weigh up to 20 kilograms.

They are dark grey-brown on the back and yellow or orange on the belly.

Here is a video about Electric Eels.